Help GPU does not work with Lenovo think centre

Yon0

Reputable
Jan 3, 2015
5
0
4,510
Title says it all, I am upgrading a Lenovo think centre m81 type 7518 with an RX 480 but it doesn't seem to boot at all, and I have upgraded the PSU to a Corsair cx 500m. I only get no video signal, no beeps or even a logo. Is this a whitelist issue or something else?