Crossfire Problem (Maybe?)

Diamond Nacho · January 5, 2015

I just recently (5 days ago) got my Crossfire rig set up.

GPUs: 2x Gigabyte Windforce Radeon R9 270x

CPU: AMD fx 6300

Memory: 8gb G.SKILL Sniper RAM

Mobo: MSI 970A-G43

PSU: Raidmax Vampire 800w Gold PSU

Windows 8.1 Pro

(Nothing is OC'd by the way. Everything is stock speeds.)

So, everything was working fine with my single 270x until I decided to buy another 270x and try Crossfire for the first time. It worked pretty well for the first few days until about two days ago. I was playing Mass Effect 2 (definitely not a graphicly intensive game) when all of a sudden, my screen goes black, monitor goes into power save mode, and my fans go to 100% (at least thats what it sounded like). So I say, "Ok, no problem, I'll just reboot. Maybe MSI Afterburner or CCC (catalyst control center) messed up the fan speeds and let them overheat causing them to shutdown." So I boot up (about 10sec after I was forced to manually shut down the PC as I had no screen image) and look at my GPU temps. They were at a very resonable 30C on one and 34C on the other. So I started up another game. Game started ok, loaded the first level, played for about ten seconds and the shutdown happened again. Reboot, check temps, feel GPU (before I rebooted of course), everything seems fine. I reinstall my game, drivers, etc. Again same result. Tried a different game, same result. So I start to re-download my game to see if Origin or the game had something to do with the issue. I start to watch a recent Linus Tech video and again, about 10 sec in, the display goes black and my monitor goes into power save. I go into my PC, check all connections (they're ok), clean up hard drive, check CPU temp (again ok), try again. Same results. So I finally decide to disable Crossfire (both GPUs are still in) and then it works. No crash or anything, it works just fine. Re-enable X-Fire, crash. I've seen some people say it could be my RAM or CPU messing up. (It was working fine before though.) Maybe my CPU is bottlenecking? (It only gets to 78% Crysis 3 max settings). Please help. I've done all I can other than do extensive RAM and CPU error checking, taking it to a store, or calling AMD support. This is extremely frustrating for my first time doing it. I would like to mention I am also broke and would prefer not to spend any money unless absolutely neccessary.

Thanks so much guys, I love you