You can find the answer to your question here:
https://www.tftcentral.co.uk/blog...
If you don't know English, here is the translation:
The PG279QE (E-model) is a little simpler in design, with a simpler stand and without the extra light features, and looks more like the original PG279Q in appearance. The back of the screen is plainer and has a matte black finish along with the stand.
Both models are based on a 27″ IPS panel that offers 2560 x 1440 resolution, 4ms G2G response time, 1000:1 contrast ratio, 350 cd/m2 brightness, 178/178 viewing angles, 8-bit colour depth and standard sRGB colour space. These models support a refresh rate of 165 Hz and feature a conventional NVIDIA G-Sync module for variable refresh rates.
Both models offer DisplayPort 1.2a, HDMI 1.4 and 2x USB 3.0 ports as well as a headphone jack. In addition, 2x 2W speakers are integrated into the screen. From the stand, the full range of tilt, height, swivel and rotation adjustments can be made.
