Intel Core i5 8400 Review | 78 Data compared

The Intel Core i5-8400 (6 cores, 2.8GHz-4.0GHz) offers a significant performance leap for mid-range systems, boasting superior gaming frame rates compared to the previous i5-7600K in titles like Battlefield 1 and GTA V. A key benefit is its 65W TDP, allowing for efficient, cool operation with standard cooling. However, significant drawbacks include a lack of backward compatibility, requiring a new Z370 motherboard despite using the LGA1151 socket, alongside a locked multiplier that prevents overclocking. Additionally, the lack of Hyper-Threading can limit performance in highly parallelized, non-gaming applications. Benchmark testing confirms the i5-8400 as a high-value gaming CPU, delivering over 130 FPS in key titles at a $182 MSRP, though performance-per-dollar was hampered by market price gouging at launch. The review recommends it for gamers, provided it is paired with future, more affordable 300-series motherboards.

The Intel Core i5-8400, reviewed on Linux, marks a significant shift to a 6-core/6-thread design for the mid-range Coffee Lake lineup, delivering a roughly 45% increase in multi-threaded performance over the previous i5-7600K. Running on Ubuntu 17.10 with kernel 4.13, the CPU demonstrated strong IPC performance, often competing with higher-tier parts in video encoding and code compilation. Key advantages identified include its competitive $\sim$182 USD launch price, 65W TDP efficiency, and robust Linux support out of the box. The processor, supporting DDR4-2666 memory, offers excellent value for desktop users seeking high performance without the cost of an i7. PhoronixDrawbacks include the absence of Hyper-Threading, which impacts performance in highly threaded tasks compared to AMD rivals, and early issues with integrated UHD Graphics 630 on Linux. Additionally, the i5-8400 requires a new Z370 motherboard, limiting upgrade paths for older LGA-1151 users.

HotHardware's review of Intel's 8th Gen Coffee Lake processors highlights the introduction of six-core configurations to the mainstream market, with the i7-8700K (6C/12T) and i5-8400 (6C/6T) delivering a significant 45% multi-threaded performance leap over previous generations. Key pros include this high performance at competitive prices, while a major con is the requirement for new Z370 motherboards, negating backward compatibility despite using the same LGA 1151 socket. Performance tests show the i7-8700K excels in gaming, and the i5-8400 is considered a high-value alternative offering 90% of the gaming performance at a lower price point, though it lacks overclocking support. While the 14nm++ process provides efficiency, continued use of thermal paste instead of solder remains a drawback.

PC Gamer's review highlights the Intel Core i5-8400 as a landmark, budget-friendly six-core processor that delivers high-end gaming performance, often matching the previous-gen i7-7700K. Key advantages include an exceptional price-to-performance ratio, a bundled cooler, low power consumption (65W TDP), and a significant increase in multitasking capability. Conversely, the chip lacks Hyper-Threading (six threads total), is multiplier-locked, and initially required a new 300-series motherboard, adding to total platform costs.

The PCGamesN review labels the Intel Core i5-8400 as a premier, budget-friendly "Coffee Lake" CPU for gaming,, largely due to its introduction of six physical cores to the mid-range lineup. It delivers exceptional frame rates that rival older, more expensive processors (like the i7-7700K) by boosting up to 3.8GHz–4.0GHz. Major advantages include a strong price-to-performance ratio under $200 and the inclusion of a stock cooler. However, the chip lacks Hyper-Threading (6-core/6-thread) and is a "locked" processor with no manual overclocking capability. Furthermore, its launch required costlier Z370 motherboards, and later supply issues increased its price, allowing competition like the Ryzen 5 2600 to offer better multi-threading value.

The Intel Core i5-8400, a six-core "Coffee Lake" processor, delivers exceptional gaming performance that often matches the previous-generation i7-7700K at a lower price point. Key advantages include its out-of-the-box efficiency and the inclusion of an adequate stock cooler, though it is limited by a locked multiplier that prevents overclocking. While offering strong single-core speed, it lacks Hyper-Threading, resulting in lower performance in heavily multi-threaded tasks compared to competitors like the Ryzen 5 1600. For more details, visit TechSpot.

According to Tom's Hardware, the Intel Core i5-8400 is a transformative, budget-friendly six-core processor that delivers a 50% core increase over its predecessor, dominating mid-range gaming. It outperforms older quad-core flagships in gaming scenarios due to strong IPC and a 4.0 GHz Turbo Boost, though it falls behind in heavily threaded productivity tasks, say Tom's Hardware. Key pros include excellent gaming value and thermal efficiency, while cons involve required Z370 motherboard upgrades, a locked multiplier, and limited thread count for workstation workloads, according to Tom's Hardware.

The Intel Core i5-8400 shifts the mainstream i5 line to a six-core design at a $182 price point, offering 6 cores and 6 threads with a 2.8GHz base clock. PCMag highlights exceptional 1080p gaming performance as a key pro, with speeds nearly matching the i7-8700K when paired with a high-end GPU, alongside strong single-core performance and an included cooler. Conversely, cons include the requirement for a new Z370 motherboard, no overclocking potential, and lower performance compared to AMD's Ryzen 5 in highly threaded tasks.

The Notebookcheck review of Intel's Coffee Lake architecture highlights a significant shift to six-core processors, with the Core i7-8700K delivering roughly 45–50% higher multithreaded performance than its predecessor, though single-core speeds remain stagnant. The Core i5-8400 offers strong, efficient performance for gamers, despite lacking Hyper-Threading and trailing competitors in certain benchmarks. Notably, these CPUs require new Z370 motherboards, and while performance and efficiency are pros, the UHD Graphics 630 integrated GPU provides only minor updates, serving as a con.

The Rock Paper Shotgun review identifies the Intel Core i5-8400 as a dominant mid-range CPU, offering exceptional gaming performance that often surpasses older i7 chips. It is highlighted as a high-value, six-core solution that serves as a strong competitor to AMD's Ryzen 5, despite its 2.8GHz base clock and lack of Hyper-Threading. Key advantages include its superior gaming efficiency and a competitive price point that makes it an excellent out-of-the-box option for builders. The included cooler and effective 4.0GHz Turbo Boost functionality enhance its value proposition for gamers. Conversely, the review notes the chip's limitations in multi-threaded, workstation-heavy tasks, where it lags behind rivals with more threads. Furthermore, as a locked processor, it lacks overclocking capabilities, which may limit appeal for enthusiasts.