BenQ TH575i
A bright, gaming friendly 1080p projector for living rooms, with Google TV in the box. A good pick if you can live with replacing a lamp.
Amazon $649$649
The BenQ TH575i rates 4.6 among 1080p and under projectors; the Optoma UHD38x rates 3.9 among 4K ones. The BenQ TH575i costs $350 less ($649 vs $999).
Optoma UHD38x
#20 in 4KFull review
A cheap, very bright 4K lamp projector for gamers and sports fans who can add a streaming stick and place it carefully.
Amazon $999$999
Prices were last checked October 29, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (1080p and under and 4K), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | BenQ TH575i | Optoma UHD38x |
|---|---|---|
| Overall rating | 4.6/5 | 3.9/5 |
| Brightness 25% | 100 3,800 ANSI lumens | 100 4,000 ANSI lumens |
| Value 15% | 98 $0.17 per lumen | 100 $0.25 per lumen |
| Resolution 10% | 100 1920 x 1080 native | 100 4K (pixel shift) |
| Streaming 15% | 100 Google TV with licensed Netflix | 0 no built-in apps; needs a streaming stick |
| Setup 10% | 50 Auto keystone, 1.1x zoom | 20 1.1x zoom |
| Light life 10% | 69 15,000 hour lamp | 69 15,000 hour lamp |
| Gaming 10% | 79 16.7 ms input lag | 100 4.2 ms input lag |
| Warranty 5% | 100 3-year warranty | 0 1-year warranty |
Specifications
| BenQ TH575i | Optoma UHD38x | |
|---|---|---|
| Picture | ||
| Brightness | 3,800 ANSI | 4,000 ANSI |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 1080p | 4K (pixel shift from 1920x1080) |
| Display | DLP | DLP |
| Light source | lamp | lamp |
| Light source life | 15,000 hours | 15,000 hours |
| HDR | - | HDR10, HLG |
| Color gamut | 88% Rec.709 | - |
| Native contrast | 15,000:1 | - |
| Dynamic contrast | - | 1,000,000:1 |
| Placement | ||
| Throw | Standard throw (1.5:1) | Standard throw (1.5:1) |
| Largest image | 300 in | 300 in |
| Autofocus | No | No |
| Auto keystone | Yes | No |
| Obstacle avoidance | No | No |
| Auto screen fit | No | No |
| Optical zoom | 1.1x | 1.1x |
| Streaming and gaming | ||
| Built-in apps | Google TV, licensed Netflix | None |
| Input lag | 16.7 ms | 4.2 ms |
| Top refresh rate | 120 Hz | 240 Hz |
| HDMI ports | 1 | 2 |
| eARC | No | - |
| Speakers | 10 W | 10 W |
| Build | ||
| Battery | None | None |
| Fan noise | 34 dB | 28 dB |
| Power | 295 W | 305 W |
| Dimensions | 11.7 x 9.3 x 4.7 in | 12.4 x 10.63 x 4.65 in (W x D x H) |
| Weight | 5.1 lb | 8.8 lb |
| Warranty | 3 years | 1 years |
| Released | 2026-07 | 2022-12 |