My graphics card it's standard graphics and or processor clock setting is too high. It crashes sometimes.
On windows I used MSIafterburner to lower it a bit, but a google told me that MSIafterburner doesnt work on linux. I tried coolbits but I couldnt get that working properly. The xorg.conf doesnt like to be edited and it had trouble staying altered between reboots.
At the moment the Graphics Clock is 786 and the Processor Clock is 1572. I'd like to change it to the values given by GeForce, 732 and 1464. And I'd really like the values to stay changed to what I set them at. Windows sneakily set them back to the old values every now and then, which was very annoying.
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-570/specifications