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Optoma GT750E Projector Optoma GT750E
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Street Price: n/a
3D: Full HD 3D
Weight: 6.6 lbs
Aspect Ratio:16:10
Lens Shift:No
Lamp Life:3,000 Hrs
4,000 (eco)
Lamp Cost:$249.00
Warranty:1 year
Connectors:  S-Video, Composite, VGA In, HDMI 1.4a (x2), RS232
Video Formats:  480i, 480p, 720p, 1080i, 1080p/60

Optoma GameTime GT750E:
For Games and More

Marc Davidson, November 10, 2011

Test Results and Connectivity

Brightness. I measured the GT750E in Bright mode with the lamp also set to Bright at 2805 lumens, or about 94% of its rating. Game mode came out to 1883 lumens, which is still easily bright enough for the 90"-diagonal image I tested with to stand up to moderate ambient light, even considering the dimming effect of 3D glasses. Switching to the Standard lamp mode drops the brightness by about 24%, to 2140 lumens with the Bright preset. For lower ambient light levels, other presets range as low as 1137 lumens with the lamp's Bright mode.

Adequate brightness uniformity. Short throw lenses often have a problem maintaining uniform brightness across the screen, so it isn't surprising that I measured only a 61% brightness uniformity with the GT750E. That's a large enough difference, that I could easily see a cool spot in the upper right corner on a solid white or color screen. However, it's a small enough difference to be hidden in any screen filled with detailed images. I didn't see it in any of the video or game screens I tested with.


The back panel on the GT750E offers a well chosen set of connectors for the focus on games, starting with two HDMI ports for computers or video sources and a VGA port for a computer or component video, with Optoma including a component video adapter with the projector, so you don't have to buy one separately.

Other ports include S-Video and composite video, a set of RCA Phono plugs for stereo audio input, a miniplug for stereo audio output, and an RS-232 connector for controlling the projector from a computer or control box.

One port that deserves special mention is the VESA 3D port. The GT750E supports both DLP-Link and RF 3D glasses with DLP-Link support built in, and RF support depending on a supplied 3D emitter that plugs into the VESA port.

Optoma recommends using RF glasses since they don't need a line-of-sight connection. That means there's no chance of momentarily breaking the line of sight and having to resync. In addition, Optoma's RF glasses are smaller, lighter, and, frankly, less dorky looking than its DLP-Link glasses. On the other hand, Optoma also says its DLP-Link glasses offer better contrast, and my subjective impression is that they give more of a sense of 3D depth. Given that the GT750E supports both options, you might want to try both before committing to buying one kind or the other.

Review Contents: Projectors for Gaming Strong Points Testing and Connectivity Limitations and Conclusion

Reader Comments(12 comments)

Posted Apr 24, 2013 9:49 AM

By Roberto Rossell

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Hello again, i have been reading a lot about the difference between RF glasses and DLP but is not clear to me which one is better to use in my case i will use them in my living room son is not a dedicate room i have reading that it is important factor. Which you would use in a room with some ambienta light

Posted Apr 24, 2013 8:23 AM

By Roberto Rossell

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Hello every one, i am really newbie in this, i know the last post was on 2011,but this PJ seems good today and my question is about how important would be have a 1080p projector instead a 720p projector on a 100 inch screen it is noticeable for a untrained eye? the reason of my question is that this PJ is 520$ on amazon and a similar 1080p pj BenQ W1080ST its about 1078$ even Acer H6510BD 3D is 774$ i want to use it for 3d gaming and watch movies equally

Posted Oct 29, 2012 2:43 PM

By arvind

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does the gt750e play both full and half sbs 3d files...and if it down scales the half sbs 1080p to 720p then it means its ? 640 x 800 (1280 x 800 / 2) for each pic.....just want to know if it plays full sbs mkv files downloaded of the net so that the resolution is not too compromised in 3d...anyone out there tested this? would be appreciated..ty

Posted Oct 1, 2012 6:33 AM

By Jon Watkins

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The reason that it says there is no scaling for 720p is because it does not fill the screen when running 720p. It puts 40 rows of black pixels on the top and 40 rows of black pixels on the bottom. The a 720p screen fits within the 1280x800 so there is no stretching of the image. When you run the projector in 1080p scales the image within 1280x720.

Posted Sep 26, 2012 1:28 PM

By Stephen

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Technically, your right. You cant say there isnt any scaling. The reason people say 720p anyways, is because scalling from the 800 to the 720, is very very very small. Downscaling from Full HD your going from 1920x1080-->1280x800. Now thats a big leap. Upscalling from 800x600 or even a native 1024x768 up to this 1280x800 is also a pretty big leap. But 1280x800 to 1280x720 is next to nothing.The 40 native downscaling on the height is not going to noticeably affect the image quality. But again, thats a whole different story when your upconverting from widescreen 480p (853×480) of regular DVDs to 720p 1280x800 (800) of this projector.

Posted Aug 15, 2012 5:35 PM

By Chuck

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""WOW"" i bought a GT750E, and WOW its great picture quality great large or small i took this projector outside and shot it on the wall of an industrial building about a 25' screen size and everyone was impressed, added sound and chairs and the crowd grew, sports everyone is at my place back yard a 16' screen BBQ oh yea YOU NEED TO DO THIS!! kids movie night, games, best bang for the buck i have ever had!! ""Short Throw" the best way to go

Posted Aug 5, 2012 4:46 AM

By Eduardo

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I have a Optoma GT700 and do not have more than 80 hours of using, but had start appearing white points at the screen, in the beggining it was only one, now it has eight, I tried everything but they are still there, anybody knows what is happening and what I can do?

Posted Jul 18, 2012 5:44 AM

By ricardo

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first of all this projector is one the cheapest 3d projectors out right is selling it for $678 with free shiping.and i have to say optoma definitely delivered on this one.i had the gt700 for a year and a half and it was a great gaming/movie projector.but the gt750e has some improvements.the image on the bluray movies and xbox 360 gaming looks brighter and has 2 hdmi 1.4 for unleashing the latest 1080p image.

Posted Dec 1, 2011 12:27 PM

By Dirk

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Did you measure output lumens in 3D mode? Was it more comparable to Bright or Game? Thanks.

Posted Nov 27, 2011 7:13 PM

By jello

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you guys say "a DLP engine with a native 1280x800 resolution, so you can show games at 720p without scaling."

how can it be "no scaling" by playing 720p content, if the native is 800p?

Posted Nov 18, 2011 9:03 AM

By Kevin

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You guys have this PJ listed as 3D ready but in the review and on the specifics page you have it listed as HDMI 1.4a. What gives?

Posted Nov 13, 2011 1:22 AM

By Reuben

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It seems like this PJ has it's niche, but it has to be careful because some other 1080p PJs are approaching 1K in street price.

The question is lag, and the question is lumens. This PJ seems to be a "gaming LANFest" type where you put it in your backpack and run. The short-throw helps with setting it up easily in a tight spot.

I just wonder, a 120" 720p vs 1080p image is easily differentiated, but maybe not with mainly 720p games.

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