Our Verdict
Optoma GT1080HDRx Wins
It offers brighter 3800 lumens and confirmed 8.4ms input lag for gaming. Choose BenQ TH671ST for auto vertical keystone and a slightly lower price, if 3000 lumens is sufficient.
Bottom Line: Optoma GT1080HDRx is the better choice. It offers brighter 3800 lumens and confirmed 8.
Key Differences
The most significant spec differences at a glance
Brightness Ansi Lumens
21% lessAdvantages
Where each product wins
Optoma
- Brightness Ansi Lumens: 21% higher (3000 vs 3800)
Who Should Buy Which?
Find the right product for your needs
Buy BenQ if...
BenQ TH671ST | 1080p
If you're a casual to serious gamer who values ease of setup and clear 1080p visuals without a premium price, the BenQ TH671ST is ideal. Its auto vertical keystone simplifies installation, and the 3000 lumens provide a bright picture for most indoor environments. Projecting a 100-inch image from just 5 feet makes it suitable for smaller rooms. It delivers a great gaming experience with low input lag, perfect for those upgrading from a TV to a large-screen projector without needing the absolute lowest input lag possible.
Buy Optoma if...
Optoma GT1080HDRx Short Throw
The Optoma GT1080HDRx is perfect for dedicated, competitive gamers and cinephiles who prioritize ultra-responsive gameplay and vibrant HDR visuals. With an 8.4ms input lag at 120Hz and 3800 lumens, it ensures smooth, bright action even in rooms with some ambient light. Its HDR support with 4K input capability enhances cinematic experiences. The impressive 15,000-hour lamp life offers longevity, making the slightly higher price a worthwhile investment for those demanding top-tier performance and future-proofing.
Spec Comparison
10 specs compared
| Specification |  |  |
|---|---|---|
| Price | $949 | $970 |
| Rating | 4.4(843) | 4.2(862) |
| Brightness Ansi Lumens | 3000 | 3800 |
| Native Resolution | 1080p | 1080p |
| Gaming Input Lag Ms | — | 8.4 |
| Throw Ratio | 0.69 | — |
| Keystone Correction | Vertical | — |
| Hdmi Ports | — | 2 |
| Hdr Support | — | Yes |
| Light Source | — | Bulb (lamp) |
| Contrast Ratio | — | 50000:1 |
| Lamp Life Hours | — | 15000 hrs |
Swipe horizontally to see all columns
Pros & Cons
Quick overview of strengths and weaknesses
BenQ TH671ST |
- Native 1080p resolution for clear images.
- 3000 lumens provides bright picture.
- Low input lag for responsive gaming.
- Projects 100-inch image from 5 feet.
- Lacks horizontal keystone adjustment.
- Integrated speaker typically offers low fidelity.
Optoma GT1080HDRx Short
- Low input lag 8.4ms for 120Hz gaming
- Short throw projects large image from 4ft
- 3800 lumens for bright images
- 15,000 hours lamp life
- Lamp light source requires eventual replacement
- Native resolution is 1080p, not 4K
- Only two HDMI ports
Frequently Asked Questions
Common questions about this comparison
Which projector is better for competitive gaming?
The Optoma GT1080HDRx is superior for competitive gaming, offering an incredibly low input lag of 8.4ms at 120Hz. While the BenQ TH671ST has low input lag, Optoma specifies a very competitive number for smooth, responsive gameplay.
What's the main difference in brightness between the two?
The Optoma GT1080HDRx is significantly brighter at 3800 ANSI lumens, compared to the BenQ TH671ST's 3000 ANSI lumens. This makes the Optoma better suited for rooms with ambient light or for producing a more vibrant image.
Is the price difference between the two projectors worth it?
The Optoma GT1080HDRx is only slightly more expensive ($970 vs $949) but offers higher brightness (3800 vs 3000 lumens), lower input lag (8.4ms), and HDR support. These enhancements often justify the small price increase, especially for serious gamers.
Does either projector support 4K resolution?
Both projectors have a native resolution of 1080p. However, the Optoma GT1080HDRx supports 4K UHD input, meaning it can receive and downscale a 4K signal, offering better compatibility with newer sources and HDR content.
Which projector is easier to set up initially?
The BenQ TH671ST offers auto vertical keystone correction, which simplifies initial setup by automatically adjusting the image shape if the projector isn't perfectly perpendicular to the screen. The Optoma lacks this auto-adjustment feature.
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