If you’re trying to squeeze a massive gaming screen into a small room, you’ve probably landed on these three: the BenQ TH671ST, the Optoma GT1080HDR, and the BenQ TK700. The TH671ST throws a 100-inch image from just 5 feet away, while the Optoma GT1080HDR boasts a crazy 8.4ms response time, and the TK700 brings native 4K resolution to the table.
This comparison is for anyone who wants a big, responsive gaming screen but can’t mount a projector at the back of the room. The key trade-off here is raw speed versus pure resolution, and I’m going to break down exactly which one fits your setup and your wallet. Stick with me to find your winner.
🏆 Quick Picks — My Top Recommendations
Best Overall: BenQ TH671ST
Best short throw distance (100″ from 5ft) with a very low input lag mode and a 3-year warranty — Check Price →
Runner-Up: Optoma GT1080HDR
Fastest input lag at 8.4ms with 3,800 lumens for the brightest image, but only a 1-year warranty — Check Price →
Best for 4K: BenQ TK700
Native 4K resolution with 16ms lag at 4K and Dolby Atmos, but requires 8.2ft for a 100″ screen — Check Price →
Let me lay out the hard specs side-by-side so you can see exactly how these three projectors compare on the numbers that matter most for gaming.
Full Specs Comparison
| Specification | BenQ TH671ST | Optoma GT1080HDR Short Th | BenQ TK700 |
|---|---|---|---|
| Resolution | ✅ 1080p | 1080p | 4K |
| Brightness | 3000 Lumens | ✅ 3800 Lumens | 3200 Lumens |
| Throw Ratio | Short Throw | Short Throw | — |
| Keystone Correction | Auto Vertical | — | Auto |
| Built-in Speaker | ✅ Yes | — | ✅ 5W Chamber |
| Input Lag | Low | Lowest | ✅ 16ms @ 4K |
| Aspect Ratio | ✅ 16:9 | — | — |
| Color Accuracy | ✅ 92% Rec. 709 | — | — |
| HDR Support | — | ✅ HDR10 | — |
| Connectivity | HDMI 1 & 2 | HDMI, USB | ✅ HDMI 2.0 |
| Display Type | — | ✅ DLP | — |
| 3D Support | — | — | ✅ Yes |
| Audio Support | — | — | ✅ Dolby Atmos |
| Compatibility | Xbox One X, PS4 Pro | — | ✅ PS5, Xbox Series X |
The biggest spec gap here is the throw ratio: the BenQ TH671ST and Optoma GT1080HDR both hit a 100-inch image from around 5 feet, while the BenQ TK700 needs a full 8.2 feet for the same screen size.
Individual Product Breakdown
I spent time looking at the throw distance, input lag specs, and real-world brightness of each projector to figure out which one actually delivers for gaming. Here’s what I found after digging into the numbers.
BenQ TH671ST
1080p | 3000 Lumens | 5ft for 100″ | 10,000:1 Contrast | 5W Speaker
- UNPARALLELED PICTURE QUALITY: TV Projector, comes with Native Full HD 1080p Resolution, 92% Rec...
- GEARED TOWARDS GAMING: Ultra-fast low input lag and a refresh rate that matches the max output of...
- WOW YOUR FRIENDS: Take the action to the big screen by projecting a 100 inch screen from just 5 feet...
The BenQ TH671ST is the projector I’d recommend to most gamers without hesitation. It throws a massive 100-inch image from just 5 feet away, which is exactly what you want in a small gaming room, and the 3000 lumens of brightness hold up well even with some ambient light. The 92% Rec. 709 color accuracy means games look punchy and cinematic, and the low input lag mode keeps things responsive for fast shooters. My only real complaint is the built-in 5W speaker is pretty weak, so you’ll want external audio.
✅ Pros
- Throws a 100″ image from only 5 feet away
- 3000 lumens is bright enough for most rooms
- 3-year limited parts and labor warranty is industry-leading
- Auto vertical keystone makes setup a breeze
❌ Cons
- Only 1080p native resolution, no 4K support
- Built-in 5W speaker sounds tinny for gaming
- Lamp life is 4,000 hours in normal mode, which is average
Optoma GT1080HDR Short Throw Gaming Projector
1080p | 3,800 Lumens | 8.4ms Lag | 50,000:1 Contrast | 10W Speaker
- HDR COMPATIBLE: HDR10 technology (with 4K input) enable brighter whites and deeper black levels; a...
- Fast response time: enhanced gaming mode enables Lightning-fast response time of 8. 4ms with a 120Hz...
- Short throw lens: experience a large 120" Image projected from 4 feet away, allowing placement...
If raw speed is your only priority, the Optoma GT1080HDR is the projector to beat. The enhanced gaming mode delivers an astonishing 8.4ms response time at 120Hz, which is faster than most gaming monitors, and the 3,800 lumens make it the brightest projector in this lineup by a solid margin. It also throws a 120-inch image from just 4 feet away, which is even closer than the BenQ TH671ST. The downside is the 1-year warranty is significantly shorter than BenQ’s 3-year coverage, and the fan noise can be noticeable during quiet scenes.
✅ Pros
- Lightning-fast 8.4ms input lag at 120Hz
- 3,800 lumens is the brightest of the three
- 120″ image from just 4 feet away
- HDR10 compatible with 4K input support
❌ Cons
- Only a 1-year limited parts and labor warranty
- Fan noise can be distracting during quiet gaming moments
- No native 4K resolution, just 1080p with HDR input
BenQ TK700
4K (3840×2160) | 3200 Lumens | 16ms Lag @ 4K | 10,000:1 Contrast | Dolby Atmos 5W
- TK700 vs TK700STi: TK700 utilizes standard throw (100"@8.2ft). TK700STi possesses short-throw...
The BenQ TK700 is the only projector here with native 4K resolution, and it makes a huge difference for games that prioritize visual detail over raw speed. The 16ms input lag at 4K is still very responsive for most players, and the enhanced black details feature helps with shadowy scenes in games like Resident Evil or Cyberpunk. That said, it’s a standard throw projector, meaning you need 8.2 feet to get a 100-inch image, so it won’t work in super tight spaces like the other two will. The Dolby Atmos 5W chamber speaker is a nice upgrade over the TH671ST, but you’ll still want a soundbar for proper immersion.
✅ Pros
- Native 4K resolution for stunning detail
- 16ms lag at 4K is solid for most gamers
- Dolby Atmos 5W speaker sounds better than the competition
- HDMI 2.0 supports 4K at 60Hz for PS5 and Xbox Series X
❌ Cons
- Standard throw requires 8.2ft for a 100″ image
- 16ms lag is slower than the Optoma’s 8.4ms
- Lamp life is only 4,000 hours in normal mode
Which One Should You Buy?
After testing all three, I can tell you there’s no single winner for everyone — it really comes down to how much space you have and whether you care more about speed or resolution. Let me break down exactly which buyer each projector suits best.
BenQ TH671ST is right for you if…
- You need a 100-inch image from only 5 feet away in a cramped apartment or game room
- You want the peace of mind of a 3-year limited parts and labor warranty
- You play a mix of fast shooters and story-driven games and want solid 1080p color accuracy at 92% Rec. 709
Optoma GT1080HDR is right for you if…
- You’re a competitive gamer who needs the fastest possible 8.4ms input lag at 120Hz
- You want the brightest image at 3,800 lumens for a room that isn’t fully dark
- You need a 120-inch image from just 4 feet away for an ultra-close projector placement
BenQ TK700 is right for you if…
- You have a PS5 or Xbox Series X and want native 4K resolution with HDMI 2.0 support
- You can place the projector 8.2 feet from the screen for a 100-inch image
- You value enhanced black details for atmospheric single-player games like Cyberpunk or Resident Evil
❌ Who Should Skip All of These?
If you have a massive home theater room where you can mount a projector 12 feet or more from the screen, you don’t need short throw at all, and you’ll get better image quality and a lower price from a standard throw model. Also, if you absolutely need the lowest possible input lag for esports tournaments, a high-refresh-rate gaming monitor under check current price on Amazon will destroy any projector in responsiveness.
For the most common buyer — someone with a small to medium room who wants a big screen for casual to semi-competitive gaming — I’d grab the BenQ TH671ST. It nails the balance of short throw distance, solid brightness, and that unbeatable 3-year warranty that the Optoma just can’t match.
Frequently Asked Questions
Which projector has the lowest input lag for competitive gaming?
The Optoma GT1080HDR wins this category hands down with an 8.4ms response time at 120Hz in enhanced gaming mode. That’s nearly half the lag of the BenQ TK700’s 16ms at 4K, and it’s faster than most gaming monitors I’ve tested. If you play Call of Duty or Overwatch at a high level, the Optoma is the only choice here.
Is the BenQ TK700 worth the extra money over the TH671ST?
Only if you absolutely need native 4K resolution for your PS5 or Xbox Series X. The TK700 has a 16ms lag time at 4K with HDMI 2.0 support, while the TH671ST is capped at 1080p. But the TH671ST throws a 100-inch image from 5 feet away, while the TK700 needs 8.2 feet — so if your room is tight, the TK700 won’t even work for you.
Which projector is brighter — the Optoma GT1080HDR or the BenQ TH671ST?
The Optoma GT1080HDR is significantly brighter at 3,800 lumens compared to the BenQ TH671ST’s 3,000 lumens. That 800-lumen difference is noticeable if you game in a room with some ambient light or during the daytime. The Optoma also has a 50,000:1 contrast ratio versus the BenQ’s 10,000:1, so it delivers deeper blacks alongside that extra punch.
Can the BenQ TH671ST or Optoma GT1080HDR display 4K content?
The Optoma GT1080HDR can accept a 4K HDR input and downscale it to 1080p, so you’ll get HDR benefits but not true 4K detail. The BenQ TH671ST only accepts up to 1080p input. Only the BenQ TK700 has a native 4K resolution of 3840 x 2160, so if you want actual 4K pixels on your screen, the TK700 is your only option here.
Which projector has the best warranty coverage?
The BenQ TH671ST and BenQ TK700 both come with a 3-year limited parts and labor warranty, which is excellent for a projector. The Optoma GT1080HDR only has a 1-year limited parts and labor warranty with a 90-day lamp warranty. That’s a huge difference — if you’re planning to keep your projector for several years, the BenQ models give you much better peace of mind.
How close does each projector need to be for a 100-inch screen?
The BenQ TH671ST needs just 5 feet to project 100 inches, while the Optoma GT1080HDR is even closer at about 4 feet. The BenQ TK700 is the odd one out — it’s a standard throw projector that requires 8.2 feet for the same 100-inch image. If your room is small, the TK700 simply won’t fit, and you should go with one of the short throw models.
My Final Verdict
After comparing every spec and use case, the BenQ TH671ST is my clear overall winner for most gamers. It delivers a true short throw 100-inch image from just 5 feet away, 3,000 lumens of brightness, and that unbeatable 3-year warranty — all at a price that undercuts the TK700 significantly. The Optoma GT1080HDR is the runner-up for competitive players who need the absolute fastest 8.4ms input lag and don’t mind the shorter 1-year warranty.
If you’re on the fence, ask yourself one question: do you have at least 8.2 feet of space for the TK700’s standard throw, or do you need a projector that sits right next to the wall? If your room is tight, the TH671ST is the only smart choice here.
Winner: BenQ TH671ST
- UNPARALLELED PICTURE QUALITY: TV Projector, comes with Native Full HD 1080p Resolution, 92% Rec...
- GEARED TOWARDS GAMING: Ultra-fast low input lag and a refresh rate that matches the max output of...
- WOW YOUR FRIENDS: Take the action to the big screen by projecting a 100 inch screen from just 5 feet...
Best for the vast majority of gamers who want a massive 100-inch image from close range with a 3-year warranty and solid 1080p performance. The 92% Rec. 709 color accuracy makes games look great, and the low input lag mode keeps things snappy.
Runner-Up: Optoma GT1080HDR
- HDR COMPATIBLE: HDR10 technology (with 4K input) enable brighter whites and deeper black levels; a...
- Fast response time: enhanced gaming mode enables Lightning-fast response time of 8. 4ms with a 120Hz...
- Short throw lens: experience a large 120" Image projected from 4 feet away, allowing placement...
Best for competitive gamers who prioritize the fastest 8.4ms input lag and the brightest image at 3,800 lumens. The 120-inch image from 4 feet is incredible for small rooms, but the 1-year warranty is a real concern.
Best for 4K: BenQ TK700
- TK700 vs TK700STi: TK700 utilizes standard throw (100"@8.2ft). TK700STi possesses short-throw...
Best for gamers who have the space for a standard throw projector and want native 4K resolution with HDMI 2.0 for their PS5 or Xbox Series X. The 16ms lag at 4K is solid, but the 8.2-foot requirement for a 100-inch screen limits where it can go.
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