Yes but OEM machines are different with a lot of custom code. My HP came with Windows 7 which I updated to Win 8 Pro. The system was doing some wierd things, so I did a Win 8 refresh which gave me a clean O/S minus all the previous programs. From the list I just installed the stuff I put on, and not all that OEM stuff HP had.
System was much more responsive and no wierdness.
I think those vendors wanted to clear there shelfs updated the cards a little and waved there magic wand, poof a 8000 series card.
AMD A10-5800K, XFX 7850 Ultra OC Edition 975MHz, 16GB RAM, Win 8.1 Pro 64 bit, MSI 7778 motherboard, 500W PSU, HP P7-1235, CCC 13.12 WHQL