ViewSonic PX749-4K
#12 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 rates 4.3 among 4K projectors; the Optoma GT1080HDR rates 3.8 among native 1080p ones. The Optoma GT1080HDR costs $381 less ($799 vs $1,180).
Optoma GT1080HDR
#19 in Native 1080pFull review
A short throw 1080p lamp projector for gaming in a small room. Newer laser models cost more but skip the lamp changes.
Amazon $799$799
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 (4K and native 1080p), 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 | ViewSonic PX749-4K | Optoma GT1080HDR |
|---|---|---|
| Overall rating | 4.3/5 | 3.8/5 |
| Brightness 25% | 100 4,000 ANSI lumens | 100 3,800 ISO 21118 lumens |
| Value 15% | 100 $0.29 per lumen | 93 $0.21 per lumen |
| Resolution 10% | 100 4K (pixel shift) | 100 1920 x 1080 native |
| 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 | 0 Manual focus and keystone |
| Light life 10% | 100 20,000 hour lamp | 69 15,000 hour lamp |
| Gaming 10% | 100 4.2 ms input lag | 99 8.4 ms input lag |
| Warranty 5% | 100 3-year warranty | 0 1-year warranty |
Specifications
| ViewSonic PX749-4K | Optoma GT1080HDR | |
|---|---|---|
| Picture | ||
| Brightness | 4,000 ANSI | 3,800 ISO 21118 |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 4K (pixel shift from 1920x1080) | 1080p |
| Display | DLP | DLP |
| Light source | lamp | lamp |
| Light source life | 20,000 hours | 15,000 hours |
| HDR | HDR10, HLG | HDR |
| Dynamic contrast | 12,000:1 | 50,000:1 |
| Placement | ||
| Throw | Standard throw (1.1:1) | Short throw (0.5:1) |
| Largest image | 300 in | 306.8 in |
| Autofocus | No | No |
| Auto keystone | Yes | No |
| Obstacle avoidance | No | No |
| Auto screen fit | No | No |
| Optical zoom | 1.3x | None |
| Streaming and gaming | ||
| Built-in apps | None | None |
| Input lag | 4.2 ms | 8.4 ms |
| Top refresh rate | 240 Hz | 120 Hz |
| HDMI ports | 2 | 2 |
| eARC | - | No |
| Speakers | 10 W | 10 W |
| Build | ||
| Battery | None | None |
| Fan noise | 33 dB | 26 dB |
| Power | 310 W | 285 W |
| Dimensions | 12.28 x 8.74 x 4.25 in (W x D x H) | 12.44 x 9.61 x 4.25 in (W x D x H) |
| Weight | 6.6 lb | 6.6 lb |
| Warranty | 3 years | 1 years |
| Released | 2023-06 | 2019-09 |