Credit to saverman
66E7GAC2AU
Resolution 1920x1080
Response Time 1 ms (MPRT) / 7 ms (Level 1) / 6 ms (Level 2) / 5 ms (Level 3) / 4 ms (Level 4)
Refresh Rate 165 Hz
Brightness 350 nits
Contrast Ratio 3000:1
Color Gamut 99% sRGB, 90% DCI-P3
Anti-glare Yes
Video Connector 2x HDMI® 2.0, 1x DP 1.4
Sync Technology AMD Radeon™ FreeSync™ Premium Compatible
The description on the website states full HD 1080. Not 1440.
Edit
I believe the difference might be you have grabbed the stats for the G27Q and not the G27.