Mac Pro 3,1: Faulty HD 5870?
Hello all
I hope someone can offer some input on this. My main computer, a Mac Pro 3,1 has an ACD 23" connected to a HD 5870 (Mac version). The video card has worked flawlessly since I bought it (used) last year (I was very happy to find one) and I've been very happy with it.
Today I noticed that my screen keeps going black, just like that. I've two boot volumes - a 10.6 and a 10.9.5 - and it happens on both: After boot - from 20 secs to 10 minutes after - the screen simply goes black (the computer still functions). I have to force a reboot to get video back.
I've connected the display to my laptop and it doesn't go black which leads me to think that it's the HD5870. Is there a way to run a diagnostics or something like that to find out what's going on?
Thanks very much in advance for any input
Philip
Mac Pro 3,1-OTHER, OS X Mavericks (10.9.4), 2x3TB 2xSSD+Sonnet TempoPro ACD 23"