AOC Q27G3XMN
Today
Previous check$300
Amazon: the cheapest today among the stores checked
5.0 out of 10 on the spec sheet
Buy on AmazonAOC Q27G3XMN or LG TRUEBLACK400?
Q27G3XMN costs $35 less today; TRUEBLACK400 has score 0.2 higher (5.2 vs. 5.0).
AOC Q27G3XMN
5.0score
LG TRUEBLACK400
5.2score · higher
AOC wins 1by componentLG wins 1
- 4.1Image3.6
- 6.5Smoothness8.5
- 5.0Connections5.0
- 4.0Ergonomics3.0
AOC Q27G3XMN is $35 the cheaperLG TRUEBLACK400 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 competitive gaming
Only AOC Q27G3XMN works: 144 Hz or more and a stated 1 ms.
Monitors for casual gaming and console
Both work. AOC Q27G3XMN is $35 cheaper.
Neither one fits: Monitors for work and study, 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
Q27G3XMN wins on ergonomics; TRUEBLACK400 wins on smoothness.
- 4.1Image3.6
- 6.5Smoothness8.5 (wins)
- 5.0Connections5.0
- 4.0 (wins)Ergonomics3.0
LG TRUEBLACK400
Today
Previous check$335
Amazon: the cheapest today among the stores checked
5.2 out of 10 on the spec sheet +0.2
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
Q27G3XMN
- Amazon Lowest price$300Buy on Amazon
TRUEBLACK400
- Amazon Lowest price$335Buy on Amazon
The math the store doesn’t do
Price divided by size and running cost, side by side.
| Math | Q27G3XMN | TRUEBLACK400 |
|---|---|---|
| Price per inch | $11.11 menor | $12.40 |
Spec sheet side by side
| Item | Q27G3XMN | TRUEBLACK400 |
|---|---|---|
| Screen | ||
| Type | Gaming (144 Hz or more) | Gaming (144 Hz or more) |
| Size | 27 ″ | 27 ″ |
| Resolution | QHD | QHD |
| Pixel density | 109 ppi | 109 ppi |
| Aspect ratio | 16:9 | 16:9 |
| Stated HDR changes | HDR1000 | HDR |
| Line changes | not listed | UltraGear |
| Smoothness | ||
| Refresh rate changes | 180 Hz | 240 Hz |
| Response time (stated) changes | 1 ms | 3 ms |
| Sync changes | not listed | G-Sync |
| Connections | ||
| HDMI ports | 1 | 1 |
| DisplayPort ports | 1 | 1 |
| Ergonomics | ||
| Height adjustment changes | Yes | not listed |
| VESA mount holes changes | not listed | Yes |
| General | ||
| Model code changes | Q27G3XMN | TRUEBLACK400 |
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.