HP OEM Radeon RX 550 PN: 940272-001 with 4GB of VRAM and requires no external power from a PSU. This GPU is fully functional and outputs video and is great for gaming on lower end systems with strict power requirements (office PCs, small ITX builds, home theater setups, etc.). This GPU was pulled from an HP Pavilion Gaming Prebuilt System, where it was tested in Task Manager and video tests.