Comparison
TK710STi vs GT3900UHD
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A side-by-side look at how the BenQ TK710STi and Optoma GT3900UHD compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
Also worth a look
More comparisons with the TK710STi and GT3900UHD
Buy TK710STi
- Buy at Amazon $1,965Free ship, TK710STi
- Buy at PlayBetter $2,199Free ship, TK710STi
- Buy at Indoor Golf Outlet $2,199Free ship, TK710STi
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Prices confirmed Nov 10, 2026 · we check every retailer daily
Buy GT3900UHD
Prices confirmed Nov 10, 2026 · we check every retailer daily
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Full specificationsEvery spec for both, line by line
Specifications
The numbers, lined up.
Image
| Spec | TK710STi | GT3900UHD |
|---|---|---|
| Resolution | 4K UHD (3840×2160); BenQ calls it True 4K (DLP, 8.3 million pixels on screen) | 4K UHD (3840×2160) |
| Lumens | 3,200 ANSI | 4,000 (ISO 21118) |
| HDR | HDR10 + HLG | HDR10, HLG |
| Color | 95% Rec. 709 | — |
| Picture Mode | — | Golf Mode |
| Screen Size | — | 30–150 in (Optoma's page and datasheet) |
- ResolutionTK710STi4K UHD (3840×2160); BenQ calls it True 4K (DLP, 8.3 million pixels on screen)GT3900UHD4K UHD (3840×2160)
- LumensTK710STi3,200 ANSIGT3900UHD4,000 (ISO 21118)
- HDRTK710STiHDR10 + HLGGT3900UHDHDR10, HLG
- ColorTK710STi95% Rec. 709GT3900UHD—
- Picture ModeTK710STi—GT3900UHDGolf Mode
- Screen SizeTK710STi—GT3900UHD30–150 in (Optoma's page and datasheet)
Hardware
| Spec | TK710STi | GT3900UHD |
|---|---|---|
| Light Source | Laser (20,000 hours) | DuraCore laser (30,000 hours, eco) |
| Throw Ratio | 0.69–0.83 (1.2× zoom) | 0.496:1 (fixed) |
| Fan Noise | 31/28 dB (normal/eco, BenQ spec) | — |
| Offset | — | 114% (±5%); no lens shift |
| Dimensions | — | 10.8 × 8.5 × 4.5 in (W × D × H, datasheet) |
- Light SourceTK710STiLaser (20,000 hours)GT3900UHDDuraCore laser (30,000 hours, eco)
- Throw RatioTK710STi0.69–0.83 (1.2× zoom)GT3900UHD0.496:1 (fixed)
- Fan NoiseTK710STi31/28 dB (normal/eco, BenQ spec)GT3900UHD—
- OffsetTK710STi—GT3900UHD114% (±5%); no lens shift
- DimensionsTK710STi—GT3900UHD10.8 × 8.5 × 4.5 in (W × D × H, datasheet)
Performance
| Spec | TK710STi | GT3900UHD |
|---|---|---|
| Input Lag | 4.2 ms @ 1080p/240Hz; 8.3 ms @ 1080p/120Hz; 16.7 ms @ 4K/60Hz | As low as 4.3 ms at 1080p/240Hz (Optoma) |
- Input LagTK710STi4.2 ms @ 1080p/240Hz; 8.3 ms @ 1080p/120Hz; 16.7 ms @ 4K/60HzGT3900UHDAs low as 4.3 ms at 1080p/240Hz (Optoma)
Software
| Spec | TK710STi | GT3900UHD |
|---|---|---|
| Includes | Android TV dongle | — |
- IncludesTK710STiAndroid TV dongleGT3900UHD—
Requirements
| Spec | TK710STi | GT3900UHD |
|---|---|---|
| Throw Distance | — | 100 in at about 3.6 ft (Optoma's manual) |
- Throw DistanceTK710STi—GT3900UHD100 in at about 3.6 ft (Optoma's manual)
Room planner
See each one in your sim room.
The planner draws each unit to scale with your room and your swing: where it mounts, the throw it needs, and whether your shadow crosses the light. Put in your room once, then switch units in the planner to compare.
Persona fitWho each one is better for
Who each one is better for
Honest persona fit, side by side.
Better for TK710STi
- Recreational Player
True 4K with laser life and HDR — the courses look genuinely impressive and the projector lasts the life of the room.
Better for GT3900UHD
- Space-Constrained
0.496 puts a 100-inch image up from about 3.6 ft, so it mounts close to the screen and out of the swing, and it does it in 4K. At $1,499 it is the least expensive 4K projector we list.
Both fit
- Performance Seeker
- Family Setup
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