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LG UltraGear 27G640A-B 27" Black

★★★★☆ 4.4 (121)

The 300Hz refresh rate and 1ms response time on a 27-inch QHD IPS panel deliver exceptionally fluid motion clarity for fast-paced gaming. Its fully adjustable stand with pivot functionality and USB-C connectivity add practical versatility beyond raw speed. This monitor is best for competitive esports players who demand high frame rates and smooth variable refresh rate performance from a single display.

Screen 27
Resolution 2560 x 1440
Panel IPS
Refresh 300 Hz
response time ms 1
adaptive sync G-Sync
HDR DisplayHDR 400
LG UltraGear 27G640A-B 27" Black monitor
64 Overall Score
Price ¥0
No listings available

Snapshot

Pros & Cons

Pros

  • Strong performance (90th percentile) 90th
  • Strong social proof (86th percentile) 86th
  • Strong ergonomic (77th percentile) 77th
  • Strong user sentiment (76th percentile) 76th

Cons

What owners think

How owner sentiment changed over time

Exclusive

Based on when customers actually wrote their reviews - so you can see whether early praise held up.

Owner sentiment has held steady over time
85/100Our AI sentiment readlow confidence · 5 sources · Jun 2026
1★2★3★4★5★Q4 '25: 5.0★ · 2 reviewsQ1 '26: 4.7★ · 3 reviews23Q4 '25Q1 '26
Avg ratingHappy (4-5★)Unhappy (1-2★)Bar height = number of reviews

Based on 5 dated customer reviews, grouped by calendar quarter. Period analysis is in English.

The proof

Performance

Performance Percentiles

Color 46
Portability 63.8
Display 51.2
Feature 72.2
User Sentiment 75.9
Ergonomic 77.3
Performance 90.3
Connectivity 45.8
Social Proof 86.1

Specifications

Full Specifications

Display

Size 27"
Resolution 2560 (QHD)
Panel Type IPS
Aspect Ratio 16:9

Performance

Refresh Rate 300 Hz
Response Time 1
Adaptive Sync G-Sync

Color & HDR

HDR DisplayHDR 400
HDR Support HDR400

Connectivity

HDMI Ports 1
USB-C 1

Ergonomics

Height Adjustable Yes
Tilt Yes
Swivel Yes
Pivot Yes

vs Competition

Spec LG UltraGear 27G640A-B 27" Samsung Odyssey Neo G9 LS57CG952NNXZA ASUS ROG Strix XG27AQDMG Dell UltraSharp U4025QW MSI MPG 321CURX QD-OLED Alienware AW-Series AW3425DW
Screen Size 27 57 26.5 39.70000076293945 32 34
Resolution 2560 x 1440 DUHD 2560 x 1440 5120 x 2160 3840 x 2160 3440x1440
Panel Type IPS VA OLED IPS OLED QD-OLED
Refresh Rate 300 240 240 120 240 240
Response Time Ms 1 1 0.029999999329447746 5 0.029999999329447746 0.029999999329447746
Adaptive Sync G-Sync FreeSync Premium Pro FreeSync Premium Pro Adaptive-Sync G-Sync Compatible FreeSync Premium Pro
Hdr DisplayHDR 400 DisplayHDR 1000 HDR10 DisplayHDR 600 DisplayHDR True Black 400 DisplayHDR 400 True Black
Compare Compare Compare Compare Compare
Product ColorCompactDisplayFeatureUser SentimentErgonomicPerformanceConnectivitySocial Proof
LG UltraGear 27G640A-B 27" 4663.851.272.275.977.390.345.886.1
Samsung Odyssey Neo G9 LS57CG952NNXZA Compare 99.17499.797.3090.387.495.395.4
ASUS ROG Strix XG27AQDMG Compare 96.47475.572.295.890.397.993.186.1
Dell UltraSharp U4025QW Compare 97.682.498.397.375.971.956.199.398.3
MSI MPG 321CURX QD-OLED Compare 97.95598.891.7090.397.981.990.8
Alienware AW-Series AW3425DW Compare 98.379.985.391.7090.397.995.395.4

Usage Scores

Overall (64.2)Gaming (63.3)Office (55)Creative (47.5)Portable (24)Professional (52.1)Entertainment (54.2)

A full written review is coming soon. The specs, scores, prices and charts above are always up to date.

Other Configurations1

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