Lenovo - ThinkVision P27u-20 vs LG - UltraGear 27GX790A-B
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Lenovo - ThinkVision P27u-20 | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rate | 60 Hz | 480 Hz |
| Peak brightness | 400 nits | 1300 nits |
| Response time (GtG) | 6 ms | 0.03 ms |
| USB-C Power Delivery | 100 W | 65 W |
| Screen size | 27 " | 26.5 " |
| G-Sync | false | true |
Between the ThinkVision P27u-20 and UltraGear 27GX790A-B, the ThinkVision P27u-20 comes out ahead in usb-c power delivery / screen size, while the UltraGear 27GX790A-B wins on refresh rate / peak brightness. Overall, the ThinkVision P27u-20 scores 62.6 and the UltraGear 27GX790A-B scores 77.6 on our Mars Score.
Which should you buy?
The UltraGear 27GX790A-B is the clear pick on raw spec strength, leading by 15.0 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 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. The single most decisive one: USB-C Power Delivery — 53.85% more. 100 W vs 65 W.
Pick the UltraGear 27GX790A-B if you care most about refresh rate / peak brightness. Its strongest claims are refresh rate, peak brightness, response time (gtg), among others. The single most decisive one: Refresh rate — 700.00% more. 480 Hz vs 60 Hz.
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.
Which should you buy: Lenovo - ThinkVision P27u-20 or LG - UltraGear 27GX790A-B?
LG - UltraGear 27GX790A-B leads the current Mars Score by 15.0 points.The more useful decision is the trade-off behind that result: compare screen size, refresh rate, panel type against the way you will actually use the product.
Choose Lenovo - ThinkVision P27u-20 if…
Lenovo - ThinkVision P27u-20 has the measurable edge on has usb c pd w, screen size in, color gamut dci p3 pct.
Choose LG - UltraGear 27GX790A-B if…
LG - UltraGear 27GX790A-B has the measurable edge on refresh rate hz, peak brightness nits, response time ms.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Lenovo - ThinkVision P27u-20 wins
- ▲USB-C Power Delivery — 53.85% more. 100 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 — 225.00% more. 1300 nits vs 400 nits.
- ▲Response time (GtG) — 99.50% less. 0.03 ms vs 6 ms.
- ▲Has G-Sync.
- ▲Has FreeSync.
- ▲Panel type: OLED (vs IPS).
Spec comparison
Panel
| Spec | Lenovo - ThinkVision P27u-20 | LG - UltraGear 27GX790A-B |
|---|---|---|
| Screen size | 27 "lead | 26.5 " |
| Panel typeⓘ | IPS | OLEDlead |
| Resolutionⓘ | 4Klead | 1440p |
| Aspect ratioⓘ | 16:9 | 16:9 |
| Curvedⓘ | false | false |
Performance
| Spec | Lenovo - ThinkVision P27u-20 | LG - UltraGear 27GX790A-B |
|---|---|---|
| Refresh rateⓘ | 60 Hz | 480 Hzlead |
| Response time (GtG)ⓘ | 6 ms | 0.03 mslead |
| Peak brightnessⓘ | 400 nits | 1300 nitslead |
| DCI-P3 coverageⓘ | 99 %lead | 98.5 % |
| HDRⓘ | true | true |
| G-Syncⓘ | false | truelead |
| FreeSyncⓘ | false | truelead |
Connectivity
| Spec | Lenovo - ThinkVision P27u-20 | LG - UltraGear 27GX790A-B |
|---|---|---|
| HDMI ports | 1 | 2lead |
| DisplayPort ports | 1 | 1 |
| USB-C inputⓘ | true | true |
| USB-C Power Deliveryⓘ | 100 Wlead | 65 W |
| KVM | truelead | false |
Frequently asked
Which has higher refresh rate, ThinkVision P27u-20 or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B refreshes at 480Hz vs 60Hz.
Which has faster response time, ThinkVision P27u-20 or UltraGear 27GX790A-B?+
UltraGear 27GX790A-B responds in 0.03ms vs 6ms.
Does ThinkVision P27u-20 or UltraGear 27GX790A-B have USB-C with power delivery?+
Both offer USB-C PD — 100W on ThinkVision P27u-20, 65W on UltraGear 27GX790A-B.