Head-to-head · Best Ultrawide Monitors

ASUS ROG Swift PG349Q vs LG 34GN850-B

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

ASUS ROG Swift PG349Q comes out ahead by a narrow margin (4.5 vs 4.4). The gap is mostly about users needing native G-Sync and robust ergonomics on a budget — read the strengths below before deciding.

Higher ratedRanked #2 in Best Ultrawide Monitors

ASUS ROG Swift PG349Q

★★★★★4.5

$800

The ASUS ROG Swift PG349Q is a solid mid-range ultrawide gaming monitor that excels in color accuracy and offers native G-Sync support for smooth gameplay. While its 1900R curvature and ergonomic stand enhance the immersive experience, the display is held back by poor black uniformity and a lack of HDR capabilities. It serves well for both gaming and professional editing tasks, though its older connectivity options and modest brightness limit its premium appeal.

Strengths

— Image color accuracy remains consistent even when viewed at extreme angles
— Includes native Nvidia G-Sync support for smooth, tear-free gaming
— Ergonomic stand offers height, tilt, and swivel adjustments with a unique helix design

Watch-outs

— Suffers from poor black uniformity typical of IPS panels
— Lacks HDR support due to limited 300 nits brightness and 1000:1 contrast ratio
— Video connectivity is restricted to older DisplayPort 1.2 and HDMI 1.4 standards

$800 · Check Price on Amazon Full review →

Ranked #4 in Best Ultrawide Monitors

LG 34GN850-B

★★★★★4.4

$900

The LG 34GN850-B is a high-performance ultrawide gaming monitor praised for its fast 144Hz refresh rate, 1ms response time, and excellent color accuracy. However, potential buyers should be aware of its inherent IPS limitations, including low contrast ratios and occasional backlight bleeding issues. It remains a strong choice for gamers prioritizing speed and color over deep blacks.

Strengths

— Delivers a fast 144Hz refresh rate with 1ms GtG response time for smooth gaming
— Features an IPS panel with excellent color accuracy and wide viewing angles
— Includes a 3440x1440 resolution that provides sharp image quality for productivity

Watch-outs

— Suffers from low contrast ratio typical of IPS panels, resulting in washed-out blacks
— Backlight bleeding and uniformity issues are frequently reported by users

$900 · Check Price on Amazon Full review →

How they stack up

ASUS ROG Swift PG349Q

The ASUS ROG Swift PG349Q distinguishes itself with native G-Sync support and a unique ergonomic stand, offering a reliable experience that avoids the burn-in concerns of the Dell Alienware AW3423DW. However, it lags behind the LG 34GN850-B in modern connectivity and brightness, and it cannot compete with the deep contrast ratios found in the MSI Optix MAG342CQR or the Samsung Odyssey G9.

LG 34GN850-B

The LG 34GN850-B offers a balanced mix of speed and color accuracy that outpaces the older connectivity and lack of HDR found in the ASUS ROG Swift PG349Q, yet it cannot match the perfect black levels of the Dell Alienware AW3423DW or the deep contrast of the MSI Optix MAG342CQR. While it shares the IPS panel limitations of the ASUS model regarding washed-out blacks, it avoids the massive desk footprint and extreme price tag of the Samsung Odyssey G9.

Specs side-by-side

Spec	ASUS ROG Swift PG349Q	LG 34GN850-B
Screen Size	34 Inches	—
Resolution	3440 x 1440 UW-QHD	3440 x 1440
Panel Technology	In-Plane Switching (IPS)	—
Refresh Rate	120Hz	144Hz
Response Time	5ms	1ms GtG
Brightness	300 cd/m²	—
Contrast Ratio	1000:1	—
Curvature	1900R	—
Panel Type	—	IPS
Adaptive Sync	—	G-Sync Compatible, FreeSync Premium Pro

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