No video output on specific mobo/gpu

ulises314

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May 25, 2016
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We are assembling a rig for a friend completely out of used parts, the procesor is an i7 860 and the gpu a XFX 7790, the card outputs video in my rig and in another friend's one, so is not dead, and the mobo works just fine with other video cards; but when we put them together the simply don't work; does anyone has any clue of what might be happening?
 

ulises314

Reputable
May 25, 2016
87
0
4,660


Originally we were using a 500watt psu that came with a cheap coolermaster case, we tried with a 800watt modular gold rated corsair power supply to rule that out, and the results are the same.