OVERALL
ALTERNATIVES
SPECS
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REVIEWS
Scored using Motherboards Methodology v1.0
Motherboards Methodology v1.0
Mathematical & Unbiased Scoring
Products in this category are evaluated mathematically under Frontumo Motherboards Methodology v1.0 using verified laboratory benchmarks, technical specifications, and authentic consumer ratings with 0% commercial bias.
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MSI X399 SLI Plus Review | 107 Data compared

Avg. price:~£220CPU socket:TR4Chipset:AMD X399Form factor:ATX

MSI X399 SLI Plus Review: Compare 107 technical specifications and user reviews to see how this product ranks in the Motherboards category and whether it is worth buying.

7.0

Overall score

Score
7.0/ 10
✕
What it is
An overall evaluation of the motherboard's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best motherboards on the market.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 57% of models
Score components

90%

6.9

Technical score

10%

7.6

User score

▲Better than 57% of motherboards
6.9

Technical score

Technical score
6.9/ 10
✕
What it is
An assessment of technical performance for products in the Motherboards category across these key areas: Platform & Features, Memory, Storage, Expansion, Ports & USB, Network, Audio, Power & Cooling.
When it matters
When you want to compare motherboards based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 57% of models
Score components

19%

7.0

Memory

16%

7.6

Platform & Features

16%

8.3

Storage

15%

3.7

Network

13%

7.2

Ports & USB

8%

5.4

Expansion

8%

7.8

Power & Cooling

5%

9.2

Audio

▲Better than 57% of motherboards
7.6

User score

User score
7.6/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the motherboard.
When it matters
When you want to understand how a motherboard performs in real-world builds and how reliable it is in terms of stability, BIOS usability, connectivity, and long-term ownership.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 77% of models
Score components

70%

7.7

User ratings

30%

7.4

Number of reviews

Based on 250 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
▼Worse than 77% of motherboards
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Best prices

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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of motherboard MSI X399 SLI Plus

Technical score
Technical score
6.9/ 10
✕
What it is
An assessment of technical performance for products in the Motherboards category across these key areas: Platform & Features, Memory, Storage, Expansion, Ports & USB, Network, Audio, Power & Cooling.
When it matters
When you want to compare motherboards based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 57% of models
Score components:

19%

7.0

Memory

16%

7.6

Platform & Features

16%

8.3

Storage

15%

3.7

Network

13%

7.2

Ports & USB

8%

5.4

Expansion

8%

7.8

Power & Cooling

5%

9.2

Audio

6.9
User score
User score
7.6/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the motherboard.
When it matters
When you want to understand how a motherboard performs in real-world builds and how reliable it is in terms of stability, BIOS usability, connectivity, and long-term ownership.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 77% of models
Score components

70%

7.7

User ratings

30%

7.4

Number of reviews

Based on 250 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
7.6
Popularity
Popularity
7.4/ 10
✕
What it is
An indicator based on the number of reviews received by the motherboard.
When it matters
When you prefer a motherboard that has already been bought and reviewed by many other users.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 65% of models
Popularity:
MSI X399 SLI Plus has a popularity score of 7.4 points, which is higher than that of 64.6% of products in this category.
7.4
Value for money
Value for money
7.7/ 10
✕
What it is
An indicator that combines the motherboard's overall rating with its cost.
When it matters
When you are looking for a motherboard that offers a strong balance of features, performance, and price.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 57% of models
Score components:

60%

7.0

Overall score

40%

9.4

Price

7.7
Brand name
MSI
CPU socket
TR4
CPU socket
TR4
▲ Better than 54% of models
This motherboard uses the TR4 CPU socket, which is more advanced than that of 53.9% of motherboards and equal to that of 0.5% of motherboards.
CPU platform
AMD
CPU platform
AMD
▼ Worse than 68% of models
This motherboard is built for the AMD CPU platform, which is less common than that of 68.5% of motherboards and equal to that of 31.5% of motherboards.
Chipset
AMD X399
Chipset
AMD X399
▼ Worse than 65% of models
This motherboard uses the AMD X399 chipset, which is less advanced than that of 64.8% of motherboards and equal to that of 0.5% of motherboards.
Form factor
ATX
Form factor
ATX
▲ Better than 48% of models
This motherboard has the ATX form factor, which is more versatile than that of 47.8% of motherboards and equal to that of 52.2% of motherboards.
Show more
DDR memory version
DDR4
DDR memory version
DDR4
▼ Worse than 36% of models
This motherboard uses DDR4 memory, which is newer than that of 13.5% of motherboards and equal to that of 50.8% of motherboards.
Memory slots
8
Memory slots
8
★ Better than 94% of models
Market range: <2 – >4
This motherboard has 8 Memory slots, which is more than 94% of motherboards and equal to 5.7% of motherboards.
Maximum memory capacity
128 GB
Maximum memory capacity
128 GB
▲ Better than 40% of models
Market range: <32 GB – >256 GB
This motherboard supports up to 128 GB of memory, which is more than 40.4% of motherboards and equal to 31.9% of motherboards.
Memory channels
4
Memory channels
4
★ Better than 93% of models
This motherboard supports 4 memory channels, which is more than 92.9% of motherboards and equal to 6.8% of motherboards.
Maximum RAM speed
3,600 MT/s
Maximum RAM speed
3,600 MT/s
▼ Worse than 59% of models
Market range: <2k MT/s – >8k MT/s
This motherboard supports memory speeds up to 3,600 MT/s, which is lower than that of 59.5% of motherboards and equal to that of 1.6% of motherboards.
Show more
N. of M.2 sockets
3
N. of M.2 sockets
3
▲ Better than 65% of models
Market range: <0 – >4
This motherboard has 3 M.2 sockets, which is more than 65.2% of motherboards and equal to 18.8% of motherboards.
M.2 slot interface per slot
?
N. of SATA 3 connectors
8
N. of SATA 3 connectors
8
▲ Better than 85% of models
Market range: <4 – >8
This motherboard has 8 SATA 3 connectors, which is more than 85.4% of motherboards and equal to 11.1% of motherboards.
Supported RAID levels
0/1/10
Supported RAID levels
0/1/10
▼ Worse than 68% of models
This motherboard supports RAID levels 0/1/10, which is narrower than 68.1% of motherboards and equal to 23.3% of motherboards.
JBOD excluded from RAID-level set
NVMe RAID support
yes
NVMe RAID support
yes
▲ Better than 40% of models
This motherboard supports NVMe RAID. 40.3% of motherboards support this feature.
requires RAID drivers
Show more
N. of PCIe 5.0 x16 slots
0
N. of PCIe 5.0 x16 slots
0
▼ Worse than 31% of models
Market range: <0 – >1
This motherboard has 0 PCIe 5.0x16 slots, which is fewer than 31.5% of motherboards and equal to 68.5% of motherboards.
N. of PCIe 4.0 x16 slots
0
N. of PCIe 4.0 x16 slots
0
▼ Worse than 45% of models
Market range: <0 – >1
This motherboard has 0 PCIe 4.0x16 slots, which is fewer than 44.5% of motherboards and equal to 55.5% of motherboards.
N. of PCIe 3.0 x16 slots
4
N. of PCIe 3.0 x16 slots
4
★ Better than 94% of models
Market range: <0 – >3
This motherboard has 4 PCIe 3.0x16 slots, which is more than 93.9% of motherboards and equal to 3.4% of motherboards.
PCIe slot electrical configuration
x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8
PCIe slot electrical configuration
x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8
★ Better than 99% of models
This motherboard uses x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8 for PCIe slot electrical configuration, which is more flexible than that of 98.9% of motherboards.
PCIe bifurcation support
yes
PCIe bifurcation support
yes
▲ Better than 40% of models
This motherboard supports PCIe bifurcation. 40.4% of motherboards support this feature.
Show more
Total USB ports (rear I/O)
12
Total USB ports (rear I/O)
12
★ Better than 93% of models
Market range: <6 – >10
This motherboard has 12 USB ports (rear I/O), which is more than 92.6% of motherboards and equal to 5.7% of motherboards.
Total USB ports (including headers)
21
Total USB ports (including headers)
21
★ Better than 94% of models
Market range: <11 – >19
This motherboard has 21 USB ports (including headers), which is more than 94.3% of motherboards and equal to 2.8% of motherboards.
Total USB-C ports (rear I/O)
1
Total USB-C ports (rear I/O)
1
▲ Better than 35% of models
Market range: <0 – >2
This motherboard has 1 USB-C ports (rear I/O), which is more than 35.5% of motherboards and equal to 48.7% of motherboards.
Total USB-C ports (including headers)
2
Total USB-C ports (including headers)
2
▲ Better than 52% of models
Market range: <0 – >3
This motherboard has 2 USB-C ports (including headers), which is more than 51.7% of motherboards and equal to 32.9% of motherboards.
N. of USB 3.2 Gen2x2 ports (USB-C)
0
N. of USB 3.2 Gen2x2 ports (USB-C)
0
▼ Worse than 18% of models
Market range: <0 – >1
This motherboard has 0 USB 3.2 Gen2x2 ports (USB-C), which is fewer than 18.3% of motherboards and equal to 81.7% of motherboards.
Show more
LAN speed
1 Gbps
LAN speed
1 Gbps
▼ Worse than 51% of models
Market range: <1 Gbps – >2.5 Gbps
This motherboard supports LAN speeds up to 1 Gbps, which is lower than that of 50.8% of motherboards and equal to that of 49.2% of motherboards.
LAN controller
?
N. of RJ45 ports
1
N. of RJ45 ports
1
▼ Worse than 14% of models
Market range: <1 – >2
This motherboard has 1 RJ45 ports, which is fewer than 14.4% of motherboards and equal to 85.6% of motherboards.
Wi-Fi connectivity
no
Wi-Fi connectivity
no
▼ Worse than 50% of models
This motherboard does not support Wi-Fi connectivity. 50.1% of motherboards support this feature.
Wi-Fi version
N/A
Show more
Audio codec
Realtek ALC1220
Audio codec
Realtek ALC1220
▲ Better than 65% of models
This motherboard uses the Realtek ALC1220 audio codec, which is more advanced than that of 65.3% of motherboards and equal to that of 12.9% of motherboards.
Audio channels
7.1
Audio channels
7.1
▲ Better than 5% of models
This motherboard offers 7.1 audio channels, which is more than 4.9% of motherboards and equal to 95.1% of motherboards.
Audio SNR
120 dB
Audio SNR
120 dB
▲ Better than 56% of models
Market range: <95 dB – >120 dB
This motherboard has an audio SNR of 120 dB, which is higher than that of 56% of motherboards and equal to that of 40.5% of motherboards.
Headphone amp support
yes
Headphone amp support
yes
▲ Better than 41% of models
This motherboard supports a headphone amp. 40.8% of motherboards support this feature.
supports up to 600Ω.
N. of 3.5mm audio jacks
5
N. of 3.5mm audio jacks
5
▲ Better than 50% of models
Market range: <2 – >6
This motherboard has 5 3.5mm audio jacks, which is more than 49.6% of motherboards and equal to 37% of motherboards.
Show more
VRM phases
13
VRM phases
13
▲ Better than 63% of models
This motherboard has 13 VRM phases, which is more than 62.5% of motherboards and equal to 0.6% of motherboards.
N. of CPU power connectors
2
N. of CPU power connectors
2
▲ Better than 55% of models
Market range: <1 – >2
This motherboard has 2 CPU power connectors, which is more than 54.6% of motherboards and equal to 45.1% of motherboards.
Dual 8-pin CPU power.
N. of fan headers
6
N. of fan headers
6
▲ Better than 50% of models
Market range: <3 – >8
This motherboard has 6 fan headers, which is more than 50% of motherboards and equal to 22.3% of motherboards.
Pump header
yes
Pump header
yes
▲ Better than 22% of models
This motherboard has a pump header. 21.9% of motherboards include this feature.
Pump header max current
2 A
Pump header max current
2 A
▲ Better than 45% of models
Market range: <0 A – >3 A
This motherboard supports up to 2 A on the pump header, which is higher than that of 45.4% of motherboards and equal to that of 32.4% of motherboards.
Show more

MSI X399 SLI Plus vs the average motherboard

246810TotalPlatform & FeaturesMemoryStorageExpansionPorts & USBNetworkAudioPower & Cooling
  • 4 more rear USB ports
    Total USB ports (rear I/O)
    12
    ★ Better than 93% of models
    Market range: <6 – >10
    This motherboard has more rear USB ports than the average motherboard (12 vs 8). The average motherboard has 8 rear USB port/s.
    12 vs 8
  • 4 more memory slots
    Memory slots
    8
    ★ Better than 94% of models
    Market range: <2 – >4
    This motherboard has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
    8 vs 4
  • 1 more M.2 sockets
    N. of M.2 sockets
    3
    ▲ Better than 65% of models
    Market range: <0 – >4
    This motherboard has more M.2 sockets than the average motherboard (3 vs 2). The average motherboard has 2 M.2 socket/s.
    3 vs 2
  • 6 more total USB connections
    Total USB ports (including headers)
    21
    ★ Better than 94% of models
    Market range: <11 – >19
    This motherboard has more total USB connections than the average motherboard (21 vs 15). The average motherboard has 15 total USB connections.
    21 vs 15
  • 1 more CPU power connectors
    N. of CPU power connectors
    2
    ▲ Better than 55% of models
    Market range: <1 – >2
    This motherboard has more CPU power connectors than the average motherboard (2 vs 1). The average motherboard has 1 CPU power connectors.
    Dual 8-pin CPU power.
    2 vs 1
  • Newer CPU socket
    CPU socket
    TR4
    ▲ Better than 54% of models
    This motherboard has newer CPU socket than the average motherboard (TR4 vs LGA 1151). The average motherboard uses LGA 1151 CPU socket.
    TR4 vs LGA 1,151
  • Includes POST code display
    POST code display
    yes
    ▲ Better than 73% of models
    This motherboard has a POST code display, while the average motherboard does not. 27.2% of motherboards include a POST code display.
  • 1 more USB 3.2 Gen2 USB-C ports
    N. of USB 3.2 Gen2 ports (USB-C)
    1
    ▲ Better than 65% of models
    Market range: <0 – >1
    This motherboard has more USB 3.2 Gen2 USB-C ports than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 USB-C port/s.
    1 vs 0
  • Newer CPU socket
    CPU socket
    TR4
    ▲ Better than 54% of models
    This motherboard has newer CPU socket than the average motherboard (TR4 vs LGA 1151). The average motherboard uses LGA 1151 CPU socket.
    TR4 vs LGA 1,151
  • Includes POST code display
    POST code display
    yes
    ▲ Better than 73% of models
    This motherboard has a POST code display, while the average motherboard does not. 27.2% of motherboards include a POST code display.
  • Rear-panel CMOS reset button
    Rear-panel CMOS reset button
    yes
    ▲ Better than 73% of models
    This motherboard has a rear-panel CMOS reset button, while the average motherboard does not. 26.7% of motherboards include a rear-panel CMOS reset button.
    Rear-panel Clear CMOS button.
  • 4 more memory slots
    Memory slots
    8
    ★ Better than 94% of models
    Market range: <2 – >4
    This motherboard has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
    8 vs 4
  • Supports ECC memory
    ECC memory support
    yes
    ▲ Better than 79% of models
    This motherboard supports ECC memory, while the average motherboard does not. 21% of motherboards support ECC memory.
    supports ECC unbuffered memory.
  • More memory channels
    Memory channels
    4
    ★ Better than 93% of models
    This motherboard has more memory channels than the average motherboard (4 vs 2). The average motherboard has 2 memory channel/s.
    4 vs 2
  • 1 more M.2 sockets
    N. of M.2 sockets
    3
    ▲ Better than 65% of models
    Market range: <0 – >4
    This motherboard has more M.2 sockets than the average motherboard (3 vs 2). The average motherboard has 2 M.2 socket/s.
    3 vs 2
  • 4 more SATA 3 connectors
    N. of SATA 3 connectors
    8
    ▲ Better than 85% of models
    Market range: <4 – >8
    This motherboard has more SATA 3 connectors than the average motherboard (8 vs 4). The average motherboard has 4 SATA 3 connectors.
    8 vs 4
  • More flexible PCIe lane configuration
    PCIe slot electrical configuration
    x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8
    ★ Better than 99% of models
    This motherboard has more flexible PCIe lane configuration than the average motherboard (x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8 vs x16/x0/x4, x8/x8/x4). The average motherboard uses x16/x0/x4, x8/x8/x4 PCIe slot lane configuration.
    x16/x8/x16/x8, x16/x0/x16/x8, x8/x8/x16/x8 vs x16/x0/x4, x8/x8/x4
  • 1 more PCIe x1 slots
    N. of PCIe x1 slots
    2
    ▲ Better than 56% of models
    Market range: <0 – >3
    This motherboard has more PCIe x1 slots than the average motherboard (2 vs 1). The average motherboard has 1 PCIe x1 slot/s.
    2 vs 1
  • 3 more PCIe 3.0x16 slots
    N. of PCIe 3.0 x16 slots
    4
    ★ Better than 94% of models
    Market range: <0 – >3
    This motherboard has more PCIe 3.0x16 slots than the average motherboard (4 vs 1). The average motherboard has 1 PCIe 3.0x16 slot/s.
    4 vs 1
  • 4 more rear USB ports
    Total USB ports (rear I/O)
    12
    ★ Better than 93% of models
    Market range: <6 – >10
    This motherboard has more rear USB ports than the average motherboard (12 vs 8). The average motherboard has 8 rear USB port/s.
    12 vs 8
  • 6 more total USB connections
    Total USB ports (including headers)
    21
    ★ Better than 94% of models
    Market range: <11 – >19
    This motherboard has more total USB connections than the average motherboard (21 vs 15). The average motherboard has 15 total USB connections.
    21 vs 15
  • 1 more USB 3.2 Gen2 USB-C ports
    N. of USB 3.2 Gen2 ports (USB-C)
    1
    ▲ Better than 65% of models
    Market range: <0 – >1
    This motherboard has more USB 3.2 Gen2 USB-C ports than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 USB-C port/s.
    1 vs 0
  • 1 more USB 3.2 Gen1 headers
    N. of USB 3.2 Gen1 headers (USB-A)
    2
    ▲ Better than 68% of models
    Market range: <1 – >2
    This motherboard has more USB 3.2 Gen1 headers than the average motherboard (2 vs 1). The average motherboard has 1 USB 3.2 Gen1 header/s.
    two internal headers
    2 vs 1
  • 4 more USB 3.2 Gen1 ports
    N. of USB 3.2 Gen1 ports (USB-A)
    8
    ★ Better than 98% of models
    Market range: <0 – >6
    This motherboard has more USB 3.2 Gen1 ports than the average motherboard (8 vs 4). The average motherboard has 4 USB 3.2 Gen1 port/s.
    8 vs 4
  • 1 more USB 3.2 Gen2 headers
    N. of USB 3.2 Gen2 headers (USB-C)
    1
    ▲ Better than 61% of models
    Market range: <0 – >1
    This motherboard has more USB 3.2 Gen2 headers than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 header/s.
    1 vs 0
  • 1 more total USB-C connections
    Total USB-C ports (including headers)
    2
    ▲ Better than 52% of models
    Market range: <0 – >3
    This motherboard has more total USB-C connections than the average motherboard (2 vs 1). The average motherboard has 1 total USB-C connections.
    2 vs 1
  • Better audio codec
    Audio codec
    Realtek ALC1220
    ▲ Better than 65% of models
    This motherboard has better audio codec than the average motherboard (Realtek ALC1220 vs Realtek ALC897). The average motherboard uses Realtek ALC897 audio codec.
    Realtek ALC1220 vs Realtek ALC897
  • 5 dB higher audio SNR
    Audio SNR
    120 dB
    ▲ Better than 56% of models
    Market range: <95 dB – >120 dB
    This motherboard has a higher audio SNR than the average motherboard (120 dB vs 115 dB). The average motherboard has audio SNR of 115 dB.
    120 dB vs 115 dB
  • 1 more CPU power connectors
    N. of CPU power connectors
    2
    ▲ Better than 55% of models
    Market range: <1 – >2
    This motherboard has more CPU power connectors than the average motherboard (2 vs 1). The average motherboard has 1 CPU power connectors.
    Dual 8-pin CPU power.
    2 vs 1
  • More VRM phases
    VRM phases
    13
    ▲ Better than 63% of models
    This motherboard has more VRM phases than the average motherboard (13 vs 10). The average motherboard has 10 VRM phase/s.
    13 vs 10
  • More basic motherboard chipset
    Chipset
    AMD X399
    ▼ Worse than 65% of models
    This motherboard has more basic motherboard chipset than the average motherboard (AMD X399 vs Intel B860). The average motherboard uses Intel B860 chipset.
    AMD X399 vs Intel B860
  • 60% lower LAN speed
    LAN speed
    1 Gbps
    ▼ Worse than 51% of models
    Market range: <1 Gbps – >2.5 Gbps
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    1 Gbps vs 2.5 Gbps
  • No Wi-Fi connectivity
    Wi-Fi connectivity
    no
    ▼ Worse than 50% of models
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    Wi-Fi antenna included
    no
    ▼ Worse than 51% of models
    This motherboard does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • No integrated graphics support
    Integrated graphics support
    no
    ▼ Worse than 89% of models
    This motherboard does not support integrated graphics, while the average motherboard does. 89.5% of motherboards support integrated graphics.
  • Fewer RAID options
    Supported RAID levels
    0/1/10
    ▼ Worse than 68% of models
    This motherboard has fewer RAID options than the average motherboard (0/1/10 vs 0/1/5/10). The average motherboard has 0/1/5/10 RAID level/s.
    JBOD excluded from RAID-level set
    0/1/10 vs 0/1/5/10
  • 1 fewer DisplayPort outputs
    N. of DisplayPort outputs
    0
    ▼ Worse than 54% of models
    Market range: <0 – >1
    This motherboard has fewer DisplayPort outputs than the average motherboard (0 vs 1). The average motherboard has 1 DisplayPort outputs.
    no onboard video outputs
    0 vs 1
  • Fewer useful accessories
    Included accessories
    SATA cables, M.2 kit
    ▼ Worse than 92% of models
    This motherboard has fewer useful accessories than the average motherboard (SATA cables, M.2 kit vs 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable). The average motherboard comes with 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable.
    SATA cables, M.2 kit vs 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable
  • 37.5% more expensive
    MSI X399 SLI Plus is more expensive than the average motherboard (£220 vs £160).
    £220 vs £160
  • 5% lower user score
    User score
    7.6/ 10
    ✕
    What it is
    A rating that combines user reviews and the total number of reviews received by the motherboard.
    When it matters
    When you want to understand how a motherboard performs in real-world builds and how reliable it is in terms of stability, BIOS usability, connectivity, and long-term ownership.
    Score distribution
    ▼▼
    <55-66-77-88-99-10
    MSI X399 SLI Plus
    the average motherboard
    MSI X399 SLI Plus has a lower user score than the average motherboard (7.62 vs 8.000).
    7.62 vs 8
  • More basic motherboard chipset
    Chipset
    AMD X399
    ▼ Worse than 65% of models
    This motherboard has more basic motherboard chipset than the average motherboard (AMD X399 vs Intel B860). The average motherboard uses Intel B860 chipset.
    AMD X399 vs Intel B860
  • No integrated graphics support
    Integrated graphics support
    no
    ▼ Worse than 89% of models
    This motherboard does not support integrated graphics, while the average motherboard does. 89.5% of motherboards support integrated graphics.
  • Fewer useful accessories
    Included accessories
    SATA cables, M.2 kit
    ▼ Worse than 92% of models
    This motherboard has fewer useful accessories than the average motherboard (SATA cables, M.2 kit vs 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable). The average motherboard comes with 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable.
    SATA cables, M.2 kit vs 2x SATA cables, Wi-Fi antenna, M.2 kit, front-panel adapter, RGB cable
  • Older CPU platform
    CPU platform
    AMD
    ▼ Worse than 68% of models
    This motherboard uses the AMD CPU platform compared to Intel on the average motherboard. The average motherboard uses Intel CPU platform.
    AMD vs Intel
  • 4 older release date
    Release date
    2017
    ▼ Worse than 72% of models
    Market range: <2k – >2k
    This motherboard is older than the average motherboard (2017 vs 2021). The average motherboard was released in 2021.
    October 2017
    2017 vs 2021
  • 23.9% lower maximum RAM speed
    Maximum RAM speed
    3,600 MT/s
    ▼ Worse than 59% of models
    Market range: <2k MT/s – >8k MT/s
    This motherboard has a lower maximum RAM speed than the average motherboard (3600 MT/s vs 4733 MT/s). The average motherboard supports RAM speed of 4733 MT/s.
    3,600 MT/s vs 4,733 MT/s
  • 27% lower overclocked RAM speed
    Maximum overclocked RAM speed
    3,600 MT/s
    ▼ Worse than 71% of models
    Market range: <2.7k MT/s – >8.2k MT/s
    This motherboard has a lower overclocked RAM speed than the average motherboard (3600 MT/s vs 4933 MT/s). The average motherboard supports overclocked RAM speed of 4933 MT/s.
    3,600 MT/s vs 4,933 MT/s
  • Fewer RAID options
    Supported RAID levels
    0/1/10
    ▼ Worse than 68% of models
    This motherboard has fewer RAID options than the average motherboard (0/1/10 vs 0/1/5/10). The average motherboard has 0/1/5/10 RAID level/s.
    JBOD excluded from RAID-level set
    0/1/10 vs 0/1/5/10
  • 2 fewer PCIe x8 slots
    N. of PCIe x8 slots
    2
    ★ Better than 99% of models
    Market range: <0 – >2
    This motherboard has fewer PCIe x8 slots than the average motherboard (2 vs 0). The average motherboard has 0 PCIe x8 slot/s.
    2 vs 0
  • 1 fewer DisplayPort outputs
    N. of DisplayPort outputs
    0
    ▼ Worse than 54% of models
    Market range: <0 – >1
    This motherboard has fewer DisplayPort outputs than the average motherboard (0 vs 1). The average motherboard has 1 DisplayPort outputs.
    no onboard video outputs
    0 vs 1
  • 1 fewer HDMI outputs
    N. of HDMI outputs
    0
    ▼ Worse than 86% of models
    Market range: <0 – >1
    This motherboard has fewer HDMI outputs than the average motherboard (0 vs 1). The average motherboard has 1 HDMI outputs.
    0 vs 1
  • 60% lower LAN speed
    LAN speed
    1 Gbps
    ▼ Worse than 51% of models
    Market range: <1 Gbps – >2.5 Gbps
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    1 Gbps vs 2.5 Gbps
  • No Wi-Fi connectivity
    Wi-Fi connectivity
    no
    ▼ Worse than 50% of models
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    Wi-Fi antenna included
    no
    ▼ Worse than 51% of models
    This motherboard does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • 1 fewer ARGB headers
    N. of ARGB headers (3-pin)
    1
    ▼ Worse than 51% of models
    Market range: <0 – >3
    This motherboard has fewer ARGB headers than the average motherboard (1 vs 2). The average motherboard has 2 ARGB header/s.
    1 vs 2

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Third-party reviews

Based on 250 buyer reviews from online shops.
Reviews last updated: May 2026 · How we calculate this
Read buyer reviews on Amazon →

What we like about MSI X399 SLI Plus

  • Excellent value for the price, lowering the barrier of entry for the X399 platform
  • Premium feature set including 128GB quad-channel DDR4 support and triple M.2 slots
  • Highly functional VRM with 13 phases that provides stable power delivery for Threadripper CPUs
  • User-friendly BIOS (Click BIOS 5) with an easy-to-use 'Game Boost' overclocking knob
  • Flashback+ feature allows for BIOS updates without a CPU installed, which is crucial for newer chip compatibility
  • Clean, professional all-black aesthetic with customizable RGB lighting via Mystic Light
  • Extensive connectivity with 12 rear USB ports and dual 8-pin CPU power connectors

What we don't like about MSI X399 SLI Plus

  • VRM can reach high temperatures (up to 96°C-100°C) under extreme loads with high-core count CPUs like the 2990WX
  • Requires immediate BIOS updates out of the box for stability and compatibility with 2nd Gen Threadripper CPUs
  • Some users reported occasional stability issues, including BSODs or freezes related to sensitive RAM timings
  • Cramped board layout near the top due to the eight DIMM slots and dual power connectors, making some installations tight
  • The CMOS battery is difficult to access, sometimes requiring significant effort or wire-cutting to replace
  • Missing a riser plug for the case front-panel headers (power/reset pins), making that connection less intuitive

Verdict

The MSI X399 SLI PLUS is an ATX motherboard built on the AMD X399 chipset, supporting 1st and 2nd Gen Ryzen Threadripper processors via the sTR4 socket. It features a professional all-black aesthetic and is equipped with eight DDR4 DIMM slots supporting up to 128GB of quad-channel memory at speeds reaching 3600MHz+ (OC). Key technical specifications include four PCIe 3.0 x16 slots with Steel Armor supporting up to 4-way NVIDIA SLI or AMD CrossFire, three Turbo M.2 slots (32Gb/s) with a thermal shield, eight SATA 6Gb/s ports, and a 13-phase DrMOS power design. Pros include its robust VRM quality for stable overclocking, extensive high-speed connectivity with USB 3.1 Gen2 Type-A and Type-C, and integrated Mystic Light RGB for customisation. Main cons involve the lack of built-in Wi-Fi and occasional reported BIOS stability issues with high-core-count processors like the 2990WX during extreme overclocking.

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