vsMars
Head-to-head

Lenovo - ThinkVision P27u-20 vs LG - UltraGear 45GX950A-B

Last updated · How Mars Score works
ThinkVision P27u-20LENOVORENDER
Probe A
Lenovo
ThinkVision P27u-20
58.3/ 100C
Performance66· 45%
Panel49· 40%
Connectivity—· 15%
UltraGear 45GX950A-BLGRENDER
Probe B
LG
UltraGear 45GX950A-B
83.8/ 100A
Performance81· 45%
Panel87· 40%
Connectivity—· 15%
Quick verdict

Between the ThinkVision P27u-20 and UltraGear 45GX950A-B, the ThinkVision P27u-20 comes out ahead in usb-c power delivery / dci-p3 coverage, while the UltraGear 45GX950A-B wins on peak brightness / refresh rate. Overall, the ThinkVision P27u-20 scores 58.3 and the UltraGear 45GX950A-B scores 83.8 on our Mars Score.

Buying advice

Which should you buy?

The UltraGear 45GX950A-B is the clear pick on raw spec strength, leading by 25.5 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 ThinkVision P27u-20 if you care most about usb-c power delivery / dci-p3 coverage. The biggest gaps in its favor are usb-c power delivery, dci-p3 coverage.

Pick the UltraGear 45GX950A-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 peak brightness, refresh rate, 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 45GX950A-B is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why Lenovo - ThinkVision P27u-20 wins

  • ▲USB-C Power Delivery — 11.11% more. 100 W vs 90 W.
  • ▲DCI-P3 coverage — 0.51% more. 99 % vs 98.5 %.

Why LG - UltraGear 45GX950A-B wins

  • ▲Peak brightness — 225.00% more. 1300 nits vs 400 nits.
  • ▲Refresh rate — 175.00% more. 165 Hz vs 60 Hz.
  • ▲Response time (GtG) — 99.50% less. 0.03 ms vs 6 ms.
  • ▲Screen size — 66.67% more. 45 " vs 27 ".
  • ▲Has G-Sync.
  • ▲Has FreeSync.
  • ▲Panel type: OLED (vs IPS).
Full readout

Spec comparison

Panel

SpecLenovo - ThinkVision P27u-20LG - UltraGear 45GX950A-B
Screen sizeⓘ27 "45 "lead
Panel typeⓘIPSOLEDlead
Resolutionⓘ4K5Klead
Aspect ratioⓘ16:921:9
Curvedⓘfalsetruelead

Performance

SpecLenovo - ThinkVision P27u-20LG - UltraGear 45GX950A-B
Refresh rateⓘ60 Hz165 Hzlead
Response time (GtG)ⓘ6 ms0.03 mslead
Peak brightnessⓘ400 nits1300 nitslead
DCI-P3 coverageⓘ99 %lead98.5 %
HDRⓘtruetrue
G-Syncⓘfalsetruelead
FreeSyncⓘfalsetruelead

Connectivity

SpecLenovo - ThinkVision P27u-20LG - UltraGear 45GX950A-B
HDMI ports12lead
DisplayPort ports11
USB-C inputtruetrue
USB-C Power Deliveryⓘ100 Wlead90 W
KVMtruetrue
Reader questions

Frequently asked

Which has higher refresh rate, ThinkVision P27u-20 or UltraGear 45GX950A-B?+

UltraGear 45GX950A-B refreshes at 165Hz vs 60Hz.

Which has faster response time, ThinkVision P27u-20 or UltraGear 45GX950A-B?+

UltraGear 45GX950A-B responds in 0.03ms vs 6ms.

Does ThinkVision P27u-20 or UltraGear 45GX950A-B have USB-C with power delivery?+

Both offer USB-C PD — 100W on ThinkVision P27u-20, 90W on UltraGear 45GX950A-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

Lenovo →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.