LG 27U631A
Today
Previous check$170
Amazon: the cheapest today among the stores checked
4.4 out of 10 on the spec sheet +0.4
Buy on AmazonLG 27U631A or LG 27UP650K?
LG 27U631A costs $109 less today and also has score 0.4 higher (4.4 vs. 4.0).
LG 27U631A
4.4score · higher
LG 27UP650K
4.0score
LG 27U631A wins 1by componentLG 27UP650K wins 2
- 3.6Image6.0
- 5.7Smoothness1.0
- 4.0Connections5.0
- ·Ergonomics3.0
LG 27U631A is $109 the cheaperLG 27UP650K is the cheaper
The best for each use
By the spec rule for each use, the same one the lists on this site use.
Monitors for work and study
Both work. LG 27U631A is $109 cheaper.
Neither one fits: Monitors for competitive gaming, Monitors for casual gaming and console, Monitors for creative work (photo and video), Monitors to use two on the desk, Cheap monitors worth buying.
The comparison in detail
Score by component, side by side
LG 27U631A wins on smoothness; 27UP650K wins on image and connections.
- 3.6Image6.0 (wins)
- 5.7 (wins)Smoothness1.0
- 4.0Connections5.0 (wins)
- N/AErgonomics3.0
LG 27UP650K
Today
Previous check$279
Amazon: the cheapest today among the stores checked
4.0 out of 10 on the spec sheet
Buy on AmazonAffiliate links: if you buy, the store pays us a commission at no cost to you.
Where is each one cheapest today?
Updated 12/11/2026
LG 27U631A
- Amazon Lowest price$170Buy on Amazon
27UP650K
- Amazon Lowest price$279Buy on Amazon
The math the store doesn’t do
Price divided by size and running cost, side by side.
| Math | LG 27U631A | 27UP650K |
|---|---|---|
| Price per inch | $6.30 menor | $10.33 |
Spec sheet side by side
| Item | LG 27U631A | 27UP650K |
|---|---|---|
| Screen | ||
| Type | General use and office | General use and office |
| Size | 27 ″ | 27 ″ |
| Resolution changes | QHD | 4K |
| Pixel density changes | 109 ppi | 163 ppi |
| Aspect ratio | 16:9 | 16:9 |
| Stated HDR changes | HDR10 | not listed |
| Line changes | not listed | UltraFine |
| Smoothness | ||
| Refresh rate changes | 100 Hz | 60 Hz |
| Response time (stated) | 5 ms | 5 ms |
| Connections | ||
| HDMI ports | 1 | 1 |
| DisplayPort ports changes | not listed | 1 |
| USB-C changes | Yes | not listed |
| Ergonomics | ||
| Pivot (portrait mode) changes | not listed | Yes |
| General | ||
| Model code changes | 27U631A | 27UP650K |
Other comparisons
How we choose
Source: Amazon.com catalog, checked on 12/11/2026.
Lowest price seen for the product on Amazon.com, shipped to New York 10001, on the day it was read, before sales tax. The model is the brand plus the name of the monitor; the versions go in the table. The price range, the median and the position use only models with a score; the price comparison looks at models whose score is within 0.5 points.
The spec score doesn’t measure the real calibration or durability, and the strong or weak point reading is just a comparison of numbers, not a buying recommendation.