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Gigabyte r7 260X no signal on boot

Gigabyte r7 260X no signal on boot
« on: April 29, 2014, 04:02:23 pm »
Specs:

AMD FX-8120

(old) GPU: AMD 7670

(new) GPU: Gigabyte R7 260X

PSU: Corsair 650w

mobo: Gigabyte 2AC8

Alright, so heres what happened. After my little adventure with an EVGA 750, I decided to return it and get a Gigabyte R7 260x, in the hopes that it will be compatible with my mobo and actually work. So, I got it today, installed it (unplugged, hit the power switch, swapped GPU's, plugged in the external connector), and turned it on. Black screen. Stuck the old GPU back in, made sure that the driver was uninstalled, and tried again. Same result. Any help would be appreciated :p