BenQ TH671ST
#5 in Native 1080pFull review
A bright short throw 1080p projector for gaming in small rooms, for buyers who don’t need 4K or HDR.
Amazon $849$849
The BenQ TH671ST is the better projector overall, rated 4.1 to 3.3. The BenQ TH671ST leads on brightness and warranty. The Oldisk Prism X1 wins on streaming and setup. The Oldisk Prism X1 costs $659.02 less ($189.98 vs $849).
Oldisk Prism X1
#58 in Native 1080pFull review
A budget native 1080p projector with built-in Netflix for bedrooms and backyards. The 3000 ANSI claim is unverified.
Amazon $189.98$189.98
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 BenQ TH671ST for brightness (3,000 ANSI lumens vs listed 3,000 lumens rating not credible) and warranty (3-year warranty vs 2-year warranty).
- Choose the Oldisk Prism X1 for streaming (Maker OS with licensed Netflix vs no built-in apps; needs a streaming stick) and setup (Autofocus, auto keystone vs Auto keystone, 1.2x zoom).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every native 1080p projector; a clear win is highlighted. How we rank explains each one.
| Factor weight | BenQ TH671ST | Oldisk Prism X1 |
|---|---|---|
| Overall rating | 4.1/5 | 3.3/5 |
| Brightness 25% | 95 3,000 ANSI lumens | 0 listed 3,000 lumens rating not credible |
| Value 15% | 84 $0.28 per lumen | 50 no rated brightness (neutral score used) |
| Resolution 10% | 100 1920 x 1080 native | 100 1920 x 1080 native |
| Streaming 15% | 0 no built-in apps; needs a streaming stick | 100 Maker OS with licensed Netflix |
| Setup 10% | 50 Auto keystone, 1.2x zoom | 60 Autofocus, auto keystone |
| Light life 10% | 69 15,000 hour lamp | 50 light source life not published (neutral score used) |
| Gaming 10% | 100 8 ms input lag | 50 input lag not published (neutral score used) |
| Warranty 5% | 100 3-year warranty | 50 2-year warranty |
Specifications
| BenQ TH671ST | Oldisk Prism X1 | |
|---|---|---|
| Picture | ||
| Brightness | 3,000 ANSI | 3,000 ANSI (listed, not credible) |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 1080p | 1080p |
| Display | DLP | - |
| Light source | lamp | - |
| Light source life | 15,000 hours | - |
| HDR | - | HDR10 |
| Color gamut | 92% Rec.709 | 98% NTSC |
| Native contrast | 10,000:1 | - |
| Placement | ||
| Throw | Short throw (0.7:1) | Standard throw |
| Largest image | 300 in | 120 in |
| Autofocus | No | Yes |
| Auto keystone | Yes | Yes |
| Obstacle avoidance | No | - |
| Auto screen fit | No | Yes |
| Optical zoom | 1.2x | - |
| Streaming and gaming | ||
| Built-in apps | None | Maker OS, licensed Netflix |
| Input lag | 8 ms | - |
| Top refresh rate | 120 Hz | - |
| HDMI ports | 2 | - |
| Speakers | 5 W | - |
| Build | ||
| Battery | None | None |
| Fan noise | 33 dB | - |
| Power | 320 W | - |
| Dimensions | 296 x 224 x 120 mm (W x D x H) | 9.06 x 7.87 x 5.83 in |
| Weight | 6 lb | 2.4 lb |
| Warranty | 3 years | 2 years |
| Released | 2017-11 | - |