XFX Radeon RX560 2GB

Memory:  2GB GDDR5

Output: HDMI, DVI, DisplayPort

This GPU needs a 6-pin PCI-e connector. I tested it on a few games and it's quite powerful. It will make mince meat of older games. On newer games you might have to turn down settings to medium or low, depending which game. 

These are the games I tested:

eFootball - low settings at 720p windowed

Dark Souls 3 - low settings 720p windowed

Tekken 7 - medium settings 720p windowed

Shenmue 3 - medium settings 720p windowed

Doom 64 - 720p windowed