Video card won't post

My buddy is currently using a Zotac h67itx-c-e motherboard, we tried 2 video cards, an R9270x and R9280x and neither card will post with his build, the computer starts but there is no image just black... He is able to get the system running using his old radeon hd6870 no problem, and those cards work on different computers (i personally tested them)

Does anyone know what the issue could be? We tried updating the bios, fiddling with the all the settings, nothing... its super annoying and he doesnt want to buy a new board...

Any tips? We tried resetting everything, it still doesnt work...

Plz any insight would be good thanks

 

cards themselves are dead ?

 

No the cards have been test on multiple computers they both work, its definitely a setting issue or something with the chipset and his motherboard...

 

Seems like the drivers are borked,

Can you boot into safemode?

 

Power supply?

hd6870: 500 Watt or greater power supply with two 75W 6-pin

Power consumption AMD Radeon R9-270X
1.System in IDLE = 116W
2.System Wattage with GPU in FULL Stress = 283W
3.Difference (GPU load) = 167W
4.Add average IDLE wattage ~10W
5.Subjective obtained GPU power consumption = ~ 177 Watts


Power consumption AMD Radeon R9-280X
1.System in IDLE = 119W
2.System Wattage with GPU in FULL Stress = 350W
3.Difference (GPU load) = 231W
4.Add average IDLE wattage ~10W
5.Subjective obtained GPU power consumption = ~ 241 Watts

 

I'd try flashing the motherboard bios with the latest version, if that fails, get a new motherboard. All this assuming the PSU is capable to run those gpus.