As an Amazon Associate I earn from qualifying purchases.

BenQ TH685 vs Optoma GT1080HDR

In this post, we will compare the BenQ TH685 and Optoma GT1080HDR, both these projectors are entry-level gaming and sports projectors.

Key Differences

FeatureBenQ TH685Optoma GT1080HDR
Resolution1080p Full HD (1920×1080)
1080p Full HD (1920×1080)
Brightness (ANSI lumens)3,500 lumens3,800 lumens
Contrast Ratio (FOFO)10,000:150,000:1
Speaker5W Speaker x 110W Speaker x 1


FeatureBenQ TH685Optoma GT1080HDR
Projection SystemDLPDLP
Resolution1080p Full HD (1920×1080)1080p Full HD (1920×1080)
Brightness (ANSI lumens)3,500 lumens3,800 lumens
Contrast Ratio (FOFO)10,000:150,000:1
Displayable Colors1.07 billion1.07 billion
Color ProfileRec.709Rec.709
Native Aspect Ratio16:916:9


FeatureBenQ TH685Optoma GT1080HDR
Light SourceLampLamp
Light Source LifeNormal – 4,000 hours
Eco -10,000 hours
SmartEco – 8,000 hours
LampSave – 15,000 hours
Bright – 4000 hours
Dynamic – 12000 hours
Eco- 10000 hours
Eco+ – 15000 hours

Content Support

FeatureBenQ TH685Optoma GT1080HDR
HDR10 SupportYesYes
HLG SupportYesNo


FeatureBenQ TH685Optoma GT1080HDR
Throw Ratio1.13~1.460.49:1
Zoom Ratio1.3x0.8 – 2.0x
Digital Lens ShiftVertical ±5%Not supported
Keystone AdjustmentVertical ±30°Vertical ±40°
Image Size30″~300″36.2”-307.8”
Horizontal Frequency15K~102KHz15.375~91.146 KHz
Vertical Scan Rate23~120Hz50~ 85 Hz (120Hz for 3D)

Dimensions and Weight

FeatureBenQ TH685Optoma GT1080HDR
Dimensions (W x H x D) inches12″ x 4″ x 9″12.4″ x 9.5″ x 4.5″
Net Weight lbs6.27.7


FeatureBenQ TH685Optoma GT1080HDR
HDMI 2.1Not availableNot available
HDMI 2x 2x 1
HDMI 1.4aNot availablex 1
VGA Inx 1x 1
Audio Inx 1x 1


FeatureBenQ TH685Optoma GT1080HDR
Speaker5W x 110W x 1
Audio Out3.5mm3.5mm
VGA Outx 1x 1
USB Power Outx 1 USB-A (1.5a)x 1 USB-A (1.5a)


FeatureBenQ TH685Optoma GT1080HDR
Input Lag8.3ms@120Hz8.4ms@120Hz


FeatureBenQ TH685Optoma GT1080HDR
Power SupplyVAC 100 ~ 240 (50/60Hz)100 ~ 240V, 50 ~ 60Hz
Typical Power ConsumptionMax-340W
Standby Power Consumption0.5W Max. at 100 ~ 240 VAC0.5W
Acoustic Noise (Typ./Eco.)Typical: 35dB
Eco: 29dB
Typical: 26dB
Max: 28dB
Operating Temperature0 ~ 40 ℃5–40°C

What’s in the Box

FeatureBenQ TH685Optoma GT1080HDR
Remote ControlYesYes
Power CordYesYes
Batteriesx2 (AAA)x2 (AAA)



BenQ TH685 has 2 HDMI 2.0 ports and comes with HLG Support which are better specs than Optoma GT1080HDR. However, Optoma GT1080HDR comes with a better contrast ratio than BenQ TH685.

See also  Sony VPL-VW295ES vs JVC DLA-X790R: Which is the Best?

BenQ TH685 and Optoma GT1080HDR, both come with very low input lag which is ideal for playing games and watching sports. If you are fine to sacrifice the HLG support, Optoma GT1080HDR would be a good buy because of the better contrast ratio along with low input response.