OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Projectors Methodology v3.0
Projectors Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Projectors Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Projectors Methodology v3.0

Optoma GT770 review: 86 specs compared

Avg. price:~£830Native panel resolution:1280x720ANSI lumens:3600Throw ratio:0.52:1Lamp life:4000 hours

Optoma GT770 Review: Compare 86 technical specifications to see how this product ranks in the Projectors category and whether it is worth buying.

Optoma GT770
7.2/10

Overall score

Score
7.2/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, best-of lists, expert reviews and owners.
How we count it
Parts: Technical score 35%, List score 30%, Reviews score 25%, Sentiment score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 51% of models
Score components

35%

6.5

Technical score

30%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

25%

?

Reviews scoreNot enough data yet, so we use 7.8, the mark of a weaker model in this category

10%

?

Sentiment scoreNot enough data yet, so we use 6.8, the mark of a weaker model in this category

â–²Better than 51% of projectors
6.8

Value for money

Value for money
6.8/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 57% of models
Score components

70%

7.2

Overall score

30%

6.1

Price

â–¼Worse than 57%
6.5

Technical score

Technical score
6.5/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 50% of models
Score components

42%

7.1

Image Quality

22%

6.8

Projection & Lens

12%

5.3

HDMI & Gaming

10%

6.1

Audio & Features

8%

5.6

Connectivity

6%

5.1

Design & Power

â–²Better than 50%
?

Reviews score

Reviews score
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
Share: Reviews count 25% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
Grades by review (0)
We have not found an independent test of this model yet. Until we do, its review part counts as 7.8.
User ratings collected online are not part of this score.
No expert tests yet
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
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Where to buy
    N/A~ £830
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 projector Optoma GT770

Technical score
Technical score
6.5/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 50% of models
Score components:

42%

7.1

Image Quality

22%

6.8

Projection & Lens

12%

5.3

HDMI & Gaming

10%

6.1

Audio & Features

8%

5.6

Connectivity

6%

5.1

Design & Power

6.5
Reviews score
7.8
List score
?
Value for money
Value for money
6.8/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 57% of models
Score components:

70%

7.2

Overall score

30%

6.1

Price

6.8
ANSI lumens
3,600
Market range: <280 – >4k
This projector reaches 3,600 ANSI lumens, brighter than 79.9% of projectors and equal to 2% of projectors.
Contrast ratio
20,000:1
This projector has a contrast ratio of 20000:1, higher than 58.9% of projectors and equal to 4.8% of projectors.
Dynamic contrast ratio.
Native panel resolution
1280x720
This projector uses a native resolution of 1280x720, lower than 82.1% of projectors and equal to 6.4% of projectors.
Output resolution
1280x800
This projector supports output resolution up to 1280x800, lower than 74.8% of projectors and equal to 8.4% of projectors.
Projection technology
DLP
Show more
Throw ratio
0.52:1
Min throw distance
0.4 m
Market range: <0.5 m – >1.651 m
This projector needs a minimum throw distance of 0.4 m, shorter than 92.3% of projectors and equal to 1.1% of projectors.
Max projection size
303 inch
Market range: <120 inch – >301 inch
This projector supports projection sizes up to 303 inch, larger than 93% of projectors and equal to 0.4% of projectors.
Zoom ratio
N/A
Motorized zoom
yes
This projector has motorised zoom. 85.4% of projectors offer this.
Show more
Input lag
?
Auto low latency mode (ALLM)
no
This projector does not switch to low-latency mode automatically. 16.1% of projectors offer this.
Variable refresh rate (VRR)
no
This projector does not support variable refresh rate. 1.8% of projectors offer this.
HDMI version
1.4
This projector supports HDMI 1.4, older than 54% of projectors and equal to 35.7% of projectors.
Max HDMI bandwidth
10.2 Gbps
Market range: <10.2 Gbps – >48 Gbps
This projector supports HDMI bandwidth up to 10.2 Gbps, lower than 51.2% of projectors and equal to 46.5% of projectors.
Show more
N. of HDMI ports
2
Market range: <1 – >2
This projector has 2 HDMI port/s, more than 45.9% of projectors and equal to 47.3% of projectors.
Wi-Fi connectivity
no
This projector does not connect to Wi-Fi networks. 53.4% of projectors offer this.
Wi-Fi version
N/A
Bluetooth connectivity
no
This projector does not support Bluetooth. 50.7% of projectors offer this.
Bluetooth version
N/A
Show more
Smart TV features
no
This projector does not have built-in smart TV features. 43.9% of projectors offer this.
Operating system
none
Android OS
no
This projector does not run Android OS. 19.1% of projectors run Android OS.
Dedicated smartphone app
no
This projector does not come with a dedicated smartphone app. 36.8% of projectors come with a dedicated smartphone app.
Remote control
yes
This projector includes a remote control. 1.5% of projectors offer this.
Show more
Light source type
lamp
This projector uses lamp light source technology, less advanced than 66.5% of projectors and equal to 33.5% of projectors.
Metal Halide bulb.
Laser light source
no
This projector does not have a laser light source. 26.8% of projectors offer this.
Lamp life
4,000 hours
Market range: <3.5k hours – >30k hours
This projector offers lamp life of 4,000 hours, longer than 78.8% of projectors and equal to 9.6% of projectors.
Lamp life (eco mode)
10,000 hours
Market range: <5k hours – >30k hours
This projector offers eco-mode lamp life of 10,000 hours, longer than 64.8% of projectors and equal to 9.7% of projectors.
Operating power consumption
243 W
Market range: <57 W – >390 W
This projector uses 243 W of power, more than 53.5% of projectors and equal to 0.1% of projectors.
Typical power draw.
Show more

Optoma GT770 vs the average projector

246810TotalImage QualityProjection & LensHDMI & GamingConnectivityAudio & FeaturesDesign & Power
  • 63.6% brighter image
    This projector has higher ANSI lumens than the average projector (3,600 vs 2,200). The average projector has 2,200 ANSI lumens.
    3,600 vs 2,200
  • 53 inch larger image size
    This projector has a higher projection size than the average projector (303 inch vs 250 inch). The average projector has 250 inch of projection size.
    303 inch vs 250 inch
  • 0.61 m shorter throw distance
    This projector has a lower throw distance than the average projector (0.4 m vs 1 m). The average projector has 1.0055 m of throw distance.
    0.4 m vs 1.0055 m
  • Motorised zoom
    This projector has motorised zoom, while the average projector does not. 14.7% of projectors support motorised zoom.
  • Advanced focus control
    This projector offers more advanced focus control than the average projector (motorized vs manual). Typical projector: manual.
    motorized vs manual
  • 0.18 inch larger DMD chip
    This projector has a higher DMD chip size than the average projector (0.7 inch vs 0.47 inch). The average projector has 0.47 inch of DMD chip size.
    0.65 inch vs 0.47 inch
  • 1 more audio input ports
    This projector has more audio input ports than the average projector (1 vs 0). The average projector has 0 audio input ports.
    1 vs 0
  • 1 more RJ45 ports
    This projector has more RJ45 ports than the average projector (1 vs 0). The average projector has 0 RJ45 ports.
    1 vs 0
  • 63.6% brighter image
    This projector has higher ANSI lumens than the average projector (3,600 vs 2,200). The average projector has 2,200 ANSI lumens.
    3,600 vs 2,200
  • 0.18 inch larger DMD chip
    This projector has a higher DMD chip size than the average projector (0.7 inch vs 0.47 inch). The average projector has 0.47 inch of DMD chip size.
    0.65 inch vs 0.47 inch
  • Higher contrast ratio
    This projector has a higher contrast ratio than the average projector (20000:1 vs 10000:1). The average projector has 10000:1 of contrast ratio.
    Dynamic contrast ratio.
    20,000:1 vs 10,000:1
  • 53 inch larger image size
    This projector has a higher projection size than the average projector (303 inch vs 250 inch). The average projector has 250 inch of projection size.
    303 inch vs 250 inch
  • 0.61 m shorter throw distance
    This projector has a lower throw distance than the average projector (0.4 m vs 1 m). The average projector has 1.0055 m of throw distance.
    0.4 m vs 1.0055 m
  • Motorised zoom
    This projector has motorised zoom, while the average projector does not. 14.7% of projectors support motorised zoom.
  • Advanced focus control
    This projector offers more advanced focus control than the average projector (motorized vs manual). Typical projector: manual.
    motorized vs manual
  • 1 more RJ45 ports
    This projector has more RJ45 ports than the average projector (1 vs 0). The average projector has 0 RJ45 ports.
    1 vs 0
  • VGA input included
    This projector supports VGA input, while the average projector does not. 44.1% of projectors support VGA input.
  • 1 more audio input ports
    This projector has more audio input ports than the average projector (1 vs 0). The average projector has 0 audio input ports.
    1 vs 0
  • 3 dB quieter operation
    This projector has a lower audible noise than the average projector (28 dB vs 31 dB). The average projector has 31 dB of audible noise.
    28 dB vs 31 dB
  • 2 dB quieter eco mode
    This projector has a lower audible noise in eco mode than the average projector (26 dB vs 28 dB). The average projector has 28 dB of audible noise in eco mode.
    26 dB vs 28 dB
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (1080p/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    1080p/60Hz vs 4K/120Hz
  • Basic light source
    This projector has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
    Metal Halide bulb.
    lamp vs laser
  • No HDR10 support
    This projector does not support HDR10, while the average projector does. 57.6% of projectors support HDR10.
  • Low native resolution
    This projector has a lower native panel resolution than the average projector (1280x720 vs 1920x1080). The average projector has a native panel resolution of 1920x1080.
    1280x720 vs 1920x1080
  • Lower output resolution
    This projector supports a lower output resolution than the average projector (1280x800 vs 1920x1080). The average projector outputs at 1920x1080 resolution.
    1280x800 vs 1920x1080
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • No Bluetooth connectivity
    This projector does not support Bluetooth, while the average projector does. 50.6% of projectors offer this.
  • No HDR10 support
    This projector does not support HDR10, while the average projector does. 57.6% of projectors support HDR10.
  • Low native resolution
    This projector has a lower native panel resolution than the average projector (1280x720 vs 1920x1080). The average projector has a native panel resolution of 1920x1080.
    1280x720 vs 1920x1080
  • Lower output resolution
    This projector supports a lower output resolution than the average projector (1280x800 vs 1920x1080). The average projector outputs at 1920x1080 resolution.
    1280x800 vs 1920x1080
  • 10 degrees less vertical correction
    This projector offers less vertical keystone correction than the average projector (20 degrees vs 30 degrees). The average projector offers vertical keystone correction of 30 degrees.
    20 degrees vs 30 degrees
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (1080p/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    1080p/60Hz vs 4K/120Hz
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • Older HDMI version
    This projector has Old HDMI standard than the average projector (1.4 vs 2). The average projector supports HDMI 2.
    1.4 vs 2
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • No Bluetooth connectivity
    This projector does not support Bluetooth, while the average projector does. 50.6% of projectors offer this.
  • Basic light source
    This projector has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
    Metal Halide bulb.
    lamp vs laser
  • 16,000 hours shorter lamp life
    This projector has a lower lamp life than the average projector (4,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
    4,000 hours vs 20,000 hours
  • 10,000 hours shorter eco lamp life
    This projector has a lower lamp life in eco mode than the average projector (10,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life in eco mode.
    10,000 hours vs 20,000 hours
  • 94 mm thicker body
    This projector is thicker than the average projector (244 mm vs 150 mm). The average projector has a thickness of 150 mm.
    244 mm vs 150 mm

Third-party reviews

What customers like about Optoma GT770

  • High brightness of 3,600 ANSI lumens, suitable for rooms with some ambient light
  • Short-throw lens allows for large 120-inch images from less than five feet away
  • Long lamp life of up to 10,000 hours in eco mode
  • Excellent for gaming with low input lag and Full 3D support
  • Features motorized focus and motorized zoom for easier setup
  • Quiet operation at approximately 28 dB (26 dB in eco mode)
  • Includes vertical and horizontal lens shift for flexible placement

What customers don't like about Optoma GT770

  • Native resolution is limited to WXGA (1280x720/800), which is lower than 1080p or 4K
  • Expert technical sites like ProjectorCentral have issued a 'Buyer Beware' warning regarding the manufacturer's cited brightness accuracy
  • Lacks built-in smart features like Wi-Fi, Bluetooth, or integrated streaming apps
  • No longer officially offered or manufactured by Optoma
  • Some general user feedback for the brand suggests potential long-term reliability and customer support issues

Verdict

The Optoma GT770 is a short-throw DLP projector featuring a native WXGA (1280 x 720) resolution, 3,600 ANSI lumens of brightness, and a high 20,000:1 contrast ratio. Its 0.52:1 throw ratio allows it to project a massive 100-inch image from less than four feet away, making it ideal for gaming and movies in small spaces. Key characteristics include Full 3D support, MHL connectivity for mobile devices, and a lamp life of up to 10,000 hours in Eco mode. Main advantages are its excellent brightness for 'lights-on' viewing, portable design at 6.7 lbs, and low 28dB audible noise in Eco mode. However, notable drawbacks include its lack of native Full HD (1080p) resolution, mono rather than stereo speakers, and the absence of modern smart features like built-in Wi-Fi or streaming apps.

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