BenQ LK830ST vs ViewSonic LS711HD

What LK830ST does better (4) and where LS711HD wins (3) — every spec side by side.

BenQ · 2025LK830ST

8.8Score

4 advantages≈ US$2,200

Higher score

ViewSonic · 2024LS711HD

6.6Score

3 advantages≈ US$1,650

9.4Picture5.8

6.1Setup & placement4.3

6.4Noise, lifetime & portability7.2

Why is LK830ST better than LS711HD?

Specifications

Only differences	BenQ LK830ST≈ US$2,2008.8	ViewSonic LS711HD≈ US$1,6506.6
Picture
Resolution (on screen)	3840 × 2160 (4K UHD)	1920 × 1080 (Full HD)
Native panel resolution	1920 × 1080 (Full HD)	1920 × 1080 (Full HD)
4K method	4K by pixel shifting	—
Display technology	DLP	DLP
Light source	Laser	Laser
Brightness (ANSI / ISO lumens)	4,000 lm	4,200 lm
Contrast ratio (dynamic / claimed)	3,000,000:1	300,000:1
HDR support	—	No
3D playback	—	Yes
Gaming
Maximum refresh rate	240 Hz	120 Hz
Lens & placement
Throw ratio	0.5:1	0.5:1
Throw type	Short throw (0.4–1.0:1)	Short throw (0.4–1.0:1)
Distance for a 100″ 16:9 image	1.11 m	1.11 m
Smallest image size	70″	35″
Largest image size	300″	300″
Optical zoom	1.25×	—
Lens shift	None	None
Autofocus	Yes	—
Keystone correction	Yes	Yes
Automatic keystone correction	No	No
Sound
Built-in speakers (total output)	15 W	15 W
Smart & streaming
Wi-Fi	Yes	Yes
Connectivity
HDMI inputs	2	2
HDMI version	—	2
USB port	Yes	Yes
Ethernet (LAN)	Yes	No
VGA input	No	No
Audio output	Yes	Yes
Battery, power & lifetime
Power consumption	250 W	210 W
Light source life	20,000 h	20,000 h
Light source life (eco mode)	—	30,000 h
Design & noise
Fan noise	30 dB	30 dB
Fan noise (eco mode)	24 dB	24 dB
Weight	3.4 kg	3 kg
Width	—	286 mm
Height	—	129 mm
Depth	—	216 mm
Colours	Black	White