Games Crash When Crossfiring MSI r9 270x Cards

[Antkin]

Hello,
I recently paired two MSI r9 270x cards to run in crossfire in my custom build, however whenever I attempt to run a game in full screen I get an automatic crash. I am using the 15.4 AMD beta drivers and also tried using the 14.14 drivers. The 2 cards come up in device manager, and it comes up as crossfired under catalyst control center and GPU-Z. I've also tested each card independently so I'm certain they work.

Any help would be really appreciated as I've tried every solution I can find online to no avail.

Edit: I'm having trouble running the crossfire render test in GPU-Z now. It worked before, not my entire system locks up and I have to manually turn it off. Not sure what I did wrong... Any help would be much appreciated.

Processor: AMD FX-6300
RAM: 8gb 1600Mhz
Power Supply: 750 Watt Gold
Motherboard: ASRock 990FX Extreme3 (Bios is at latest version)
Video Cards: MSI R9 270x * 2

 

[Dazinek]

What exact PSU do you have? And, Have you tried doing a CLEAN driver update?

 

[Antkin]

What exact PSU do you have? And, Have you tried doing a CLEAN driver update?

The exact PSU is the EVGA Supernova NEX750G. And I did a complete driver removal using the Guru3D tool every time I installed a different version of the catalyst video driver.

 

[BkHippy]

I have been having the same trouble ended up putting the old cards back in till i got a few projects done ........so finally got around to putting them back in my system and the issue has gotten worse run each card independent and they are great but add the second and crash after crash so it looks like i have a spare for now will try writing MSI support see if they have a solution if not it was an expensive lesson