The Asus ROG Swift OLED PG27UCDM is a 27-inch 4K QD-OLED monitor that delivers gorgeous image quality and a long list of features, though it certainly isn’t inexpensive.

As you can see from the above image, the ROG Ally X and ROG Ally are the same width and height (if there is a difference, it is extremely slight and negligible).

Asus ROG Strix XG27ACS – HDR Image Quality. The Asus ROG Strix XG27ACS is VESA DisplayHDR 400 certified, so you might think that it's a decent pick for HDR content.

Asus ROG Swift PG27AQDP HDR image quality. The Asus ROG Swift PG27AQDP’s focus on motion clarity makes it easy to overlook the monitor’s HDR performance. That would be a mistake, ...

Asus ROG Strix XG27UCG gaming monitor review ... (Image credit: Future) Screen size: 27-inch Resolution: 3,840 x 2,160 Brightness: 400 nits Contrast: 1,000:1 Response time: 1 ms ...