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ASUS - ROG Swift PG34WCDM vs LG - UltraGear 27GX790A-B

Last updated · How Mars Score works
ROG Swift PG34WCDMASUSRENDER
Probe A
ASUS
ROG Swift PG34WCDM
75.1/ 100B
Performance84· 45%
Panel65· 40%
Connectivity—· 15%
UltraGear 27GX790A-BLGRENDER
Probe B
LG
UltraGear 27GX790A-B
72.6/ 100B
Performance92· 45%
Panel48· 40%
Connectivity—· 15%
Quick verdict

Between the ROG Swift PG34WCDM and UltraGear 27GX790A-B, the ROG Swift PG34WCDM comes out ahead in usb-c power delivery / screen size, while the UltraGear 27GX790A-B wins on refresh rate. Overall, the ROG Swift PG34WCDM scores 75.1 and the UltraGear 27GX790A-B scores 72.6 on our Mars Score.

Buying advice

Which should you buy?

These two are nearly even on the Mars Score (75.1 vs 72.6). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the ROG Swift PG34WCDM if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are usb-c power delivery, screen size, dci-p3 coverage, among others.

Pick the UltraGear 27GX790A-B if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are refresh rate.

Both ship with comparable response time (gtg), peak brightness, g-sync, so those specs do not separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.

Why ASUS - ROG Swift PG34WCDM wins

  • ▲USB-C Power Delivery — 38.46% more. 90 W vs 65 W.
  • ▲Screen size — 28.30% more. 34 " vs 26.5 ".
  • ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.
  • ▲Panel type: QD-OLED (vs OLED).

Why LG - UltraGear 27GX790A-B wins

  • ▲Refresh rate — 100.00% more. 480 Hz vs 240 Hz.
Full readout

Spec comparison

Panel

SpecASUS - ROG Swift PG34WCDMLG - UltraGear 27GX790A-B
Screen sizeⓘ34 "lead26.5 "
Panel typeⓘQD-OLEDleadOLED
Resolutionⓘ1440p1440p
Aspect ratioⓘ21:916:9
Curvedⓘtrueleadfalse

Performance

SpecASUS - ROG Swift PG34WCDMLG - UltraGear 27GX790A-B
Refresh rateⓘ240 Hz480 Hzlead
Response time (GtG)ⓘ0.03 ms0.03 ms
Peak brightnessⓘ1300 nits1300 nits
DCI-P3 coverageⓘ99 %lead98.5 %
HDRⓘtruetrue
G-Syncⓘtruetrue
FreeSyncⓘtruetrue

Connectivity

SpecASUS - ROG Swift PG34WCDMLG - UltraGear 27GX790A-B
HDMI ports22
DisplayPort ports11
USB-C inputtruetrue
USB-C Power Deliveryⓘ90 Wlead65 W
KVMtrueleadfalse
Reader questions

Frequently asked

Which has higher refresh rate, ROG Swift PG34WCDM or UltraGear 27GX790A-B?+

UltraGear 27GX790A-B refreshes at 480Hz vs 240Hz.

Which has faster response time, ROG Swift PG34WCDM or UltraGear 27GX790A-B?+

UltraGear 27GX790A-B responds in 0.03ms vs 0.03ms.

Does ROG Swift PG34WCDM or UltraGear 27GX790A-B have USB-C with power delivery?+

Both offer USB-C PD — 90W on ROG Swift PG34WCDM, 65W on UltraGear 27GX790A-B.

Drill down

Spec-level deep dives

Screen size→Panel type→Resolution→Aspect ratio→Curved→Refresh rate→Response time (GtG)→Peak brightness→DCI-P3 coverage→HDR→G-Sync→FreeSync→
By manufacturer

More from the same brands

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LG →4

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