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- GT2100HDR vs PX749-4K
Optoma GT2100HDR vs ViewSonic PX749-4K
What GT2100HDR does better (2) and where PX749-4K wins (2) — every spec side by side.
Dimensions
Size comparison
GT2100HDRPX749-4K
| GT2100HDR | PX749-4K | Difference | |
|---|---|---|---|
| Height | 114 mm | 222 mm | −108 mm |
| Width | 274 mm | 312 mm | −38 mm |
| Depth | 216 mm | 108 mm | +108 mm |
| Weight | 3 kg | 3 kg | = |
Drawn to the same scale from the official dimensions (front and side).
Why is GT2100HDR better than PX749-4K?
- Brightness (ANSI / ISO lumens)4,200 lm vs 4,000 lm+5%
- Contrast ratio (dynamic / claimed)300,000:1 vs 12,000:125×
Why is PX749-4K better than GT2100HDR?
- Resolution (on screen)1920 × 1080 (Full HD) vs 3840 × 2160 (4K UHD)
- Light source life30,000 h vs 40,000 h+33%
Specifications
Side by side
| Picture | ||
| Resolution (on screen) | 1920 × 1080 (Full HD) | 3840 × 2160 (4K UHD) |
| Native panel resolution | 1920 × 1080 (Full HD) | 1920 × 1080 (Full HD) |
| 4K method | — | 4K by pixel shifting |
| Display technology | DLP | DLP |
| Light source | Laser | Lamp |
| Brightness (ANSI / ISO lumens) | 4,200 lm | 4,000 lm |
| Contrast ratio (dynamic / claimed) | 300,000:1 | 12,000:1 |
| HDR support | Yes | — |
| Gaming | ||
| Maximum refresh rate | 120 Hz | — |
| Lens & placement | ||
| Throw ratio | 0.5:1 | — |
| Throw type | Short throw (0.4–1.0:1) | — |
| Distance for a 100″ 16:9 image | 1.11 m | — |
| Smallest image size | 36″ | — |
| Largest image size | 300″ | — |
| Lens shift | None | — |
| Keystone correction | Yes | — |
| Automatic keystone correction | No | — |
| Sound | ||
| Built-in speakers (total output) | 15 W | — |
| Smart & streaming | ||
| Wi-Fi | Yes | — |
| Connectivity | ||
| HDMI inputs | 2 | 2 |
| HDMI version | — | 2 |
| USB port | Yes | Yes |
| Ethernet (LAN) | Yes | Yes |
| VGA input | No | No |
| Audio output | Yes | Yes |
| Battery, power & lifetime | ||
| Power consumption | 173 W | — |
| Light source life | 30,000 h | 40,000 h |
| Light source life (eco mode) | — | 20,000 h |
| Design & noise | ||
| Fan noise | 36 dB | — |
| Fan noise (eco mode) | 29 dB | — |
| Weight | 3 kg | 3 kg |
| Width | 274 mm | 312 mm |
| Height | 114 mm | 222 mm |
| Depth | 216 mm | 108 mm |
| Colours | White | White |
