vsMars
Head-to-head

Samsung - ViewFinity S9 (S90PC) vs LG - UltraGear 27GX790A-B

Last updated · How Mars Score works
ViewFinity S9 (S90PC)SAMSUNGRENDER
Probe A
Samsung
ViewFinity S9 (S90PC)
59.3/ 100C
Performance68· 45%
Panel49· 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 ViewFinity S9 (S90PC) and UltraGear 27GX790A-B, the ViewFinity S9 (S90PC) comes out ahead in usb-c power delivery and screen size, while the UltraGear 27GX790A-B wins on refresh rate and peak brightness. Overall, the ViewFinity S9 (S90PC) scores 59.3 and the UltraGear 27GX790A-B scores 72.6 on our Mars Score.

Buying advice

Which should you buy?

The UltraGear 27GX790A-B is the clear pick on raw spec strength, leading by 13.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the ViewFinity S9 (S90PC) 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.

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, peak brightness, response time (gtg), among others.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: the UltraGear 27GX790A-B is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why Samsung - ViewFinity S9 (S90PC) wins

  • ▲USB-C Power Delivery — 38.46% more. 90 W vs 65 W.
  • ▲Screen size — 1.89% more. 27 " vs 26.5 ".
  • ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.

Why LG - UltraGear 27GX790A-B wins

  • ▲Refresh rate — 700.00% more. 480 Hz vs 60 Hz.
  • ▲Peak brightness — 116.67% more. 1300 nits vs 600 nits.
  • ▲Response time (GtG) — 99.40% less. 0.03 ms vs 5 ms.
  • ▲Has G-Sync.
  • ▲Has FreeSync.
  • ▲Panel type: OLED (vs IPS).
Full readout

Spec comparison

Panel

SpecSamsung - ViewFinity S9 (S90PC)LG - UltraGear 27GX790A-B
Screen sizeⓘ27 "lead26.5 "
Panel typeⓘIPSOLEDlead
Resolutionⓘ5Klead1440p
Aspect ratioⓘ16:916:9
Curvedⓘfalsefalse

Performance

SpecSamsung - ViewFinity S9 (S90PC)LG - UltraGear 27GX790A-B
Refresh rateⓘ60 Hz480 Hzlead
Response time (GtG)ⓘ5 ms0.03 mslead
Peak brightnessⓘ600 nits1300 nitslead
DCI-P3 coverageⓘ99 %lead98.5 %
HDRⓘtruetrue
G-Syncⓘfalsetruelead
FreeSyncⓘfalsetruelead

Connectivity

SpecSamsung - ViewFinity S9 (S90PC)LG - UltraGear 27GX790A-B
HDMI ports12lead
DisplayPort ports01lead
USB-C inputtruetrue
USB-C Power Deliveryⓘ90 Wlead65 W
KVMfalsefalse
Reader questions

Frequently asked

Which has higher refresh rate, ViewFinity S9 (S90PC) or UltraGear 27GX790A-B?+

UltraGear 27GX790A-B refreshes at 480Hz vs 60Hz.

Which has faster response time, ViewFinity S9 (S90PC) or UltraGear 27GX790A-B?+

UltraGear 27GX790A-B responds in 0.03ms vs 5ms.

Does ViewFinity S9 (S90PC) or UltraGear 27GX790A-B have USB-C with power delivery?+

Both offer USB-C PD — 90W on ViewFinity S9 (S90PC), 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

Samsung →4
LG →4

vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.