Resolved 2009 MP major graphics problems & crashing loop

Kissaragi

macrumors 68020
Original poster
Nov 16, 2006
2,338
361
Hi, this morning when using my 2009 mac pro I suddenly had the screen go white. I restarted and found small horizontal lines across my login picture but a second restart seemed to solve that until I had another white screen after a few minutes of use. The third restart led to vertical lines, solid colours over the screen, parts of the screen disappearing, flashing and various other problems.

I assumed my graphics card was faulty and needed replacing but now every time I start up I have small short vertical lines across the whole screen and I can't get past the log in before the screen goes white, then black, then to the your computer encountered a problem screen in a loop of crashing and restarting

Im wondering if this could be the motherboard failing or if the GPU could cause the crashing?

Im running the sapphire mac edition 7950 and I've tried resetting the SMC and PRAM with no effect.

Thanks all
 

Kissaragi

macrumors 68020
Original poster
Nov 16, 2006
2,338
361
I would put my money on faulty graphics card.
Thanks for the reply. The GPU can cause the constant crashing then? I was all set to order a new card until I found the machine was in this loop of constant crashes.
 

Kissaragi

macrumors 68020
Original poster
Nov 16, 2006
2,338
361
I found a flashed 680 for a reasonable price so ill give that a go when it arrives. Thanks for the help everyone.
 

MacVidCards

Suspended
Nov 17, 2008
7,506
1,029
Hollywood, CA
I found a flashed 680 for a reasonable price so ill give that a go when it arrives. Thanks for the help everyone.
Try holding shift down.

Sometimes this will allow machine with ad GPU to get to desktop.

8800GT with your symptoms have better than 50/50 odds of getting baked back to life.

Other cards are good for e-recycle.
 

Kissaragi

macrumors 68020
Original poster
Nov 16, 2006
2,338
361
The nvidia gtx 680 came today and it solved all the problems, thanks for the help guys.