ViewSonic PX749-4K
#10 in 4KFull review
A bright, low-lag 4K gaming projector for console and PC players who already have a streaming device.
Amazon $1,180$1,180
The ViewSonic PX749-4K is the better projector overall, rated 4.3 to 3.9. The ViewSonic PX749-4K leads on warranty, light life and setup. The Optoma UHD38x costs $181 less ($999 vs $1,180).
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.
Which should you buy?
- Choose the ViewSonic PX749-4K for warranty (3-year warranty vs 1-year warranty), light life (20,000 hour lamp vs 15,000 hour lamp) and setup (Auto keystone, 1.3x zoom vs 1.1x zoom).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 4K projector; a clear win is highlighted. How we rank explains each one.
| Factor weight | ViewSonic PX749-4K | Optoma UHD38x |
|---|---|---|
| Overall rating | 4.3/5 | 3.9/5 |
| Brightness 25% | 100 4,000 ANSI lumens | 100 4,000 ANSI lumens |
| Value 15% | 100 $0.29 per lumen | 100 $0.25 per lumen |
| Resolution 10% | 100 4K (pixel shift) | 100 4K (pixel shift) |
| Streaming 15% | 0 no built-in apps; needs a streaming stick | 0 no built-in apps; needs a streaming stick |
| Setup 10% | 50 Auto keystone, 1.3x zoom | 20 1.1x zoom |
| Light life 10% | 100 20,000 hour lamp | 69 15,000 hour lamp |
| Gaming 10% | 100 4.2 ms input lag | 100 4.2 ms input lag |
| Warranty 5% | 100 3-year warranty | 0 1-year warranty |
Specifications
| ViewSonic PX749-4K | Optoma UHD38x | |
|---|---|---|
| Picture | ||
| Brightness | 4,000 ANSI | 4,000 ANSI |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 4K (pixel shift from 1920x1080) | 4K (pixel shift from 1920x1080) |
| Display | DLP | DLP |
| Light source | lamp | lamp |
| Light source life | 20,000 hours | 15,000 hours |
| HDR | HDR10, HLG | HDR10, HLG |
| Dynamic contrast | 12,000:1 | 1,000,000:1 |
| Placement | ||
| Throw | Standard throw (1.1:1) | 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 | 1.3x | 1.1x |
| Streaming and gaming | ||
| Built-in apps | None | None |
| Input lag | 4.2 ms | 4.2 ms |
| Top refresh rate | 240 Hz | 240 Hz |
| HDMI ports | 2 | 2 |
| Speakers | 10 W | 10 W |
| Build | ||
| Battery | None | None |
| Fan noise | 33 dB | 28 dB |
| Power | 310 W | 305 W |
| Dimensions | 12.28 x 8.74 x 4.25 in (W x D x H) | 12.4 x 10.63 x 4.65 in (W x D x H) |
| Weight | 6.6 lb | 8.8 lb |
| Warranty | 3 years | 1 years |
| Released | 2023-06 | 2022-12 |