I recently upgraded my pc's graphics card from an ATI Radeon HD 5870 to a Asus GTX 570 (I also swapped to Nvidia because there were reported problems with ATI cards crashing when streaming online with xSplit (Which my old ATI did))
Basically the problems are, I start up my pc and its then working fine for awhile, no crashing, no lag seems to be working all well, however when I seem to put load onto the graphics card it will crash after about 5-10 minutes of it running the game.
When it does crash blue squares appear on my screen, all scattered over it and my whole pc freezes up and I cannot control it.
I have not done anything in terms of trying to fix it yet as im kinda fresh when it comes to Hardware, i've never upgraded my gfx card, only upgraded RAM, installed new HDD's and a PSU.
The correct drivers are installed and I have not changed any settings with the drivers.
If you have any idea why my graphics card is crashing then please share
PS: While im playing minecraft with my Asus GTX 570, the boundaries between the blocks on minecraft have while outlines around them, almost like a wireframe, I switched back to my ATI Radeon and these lines did not appear, however when I put my new gfx card in they come back, if you know why this is please share also
Do you still have Drivers from both, ATI/AMD and Nvidia on the rig?
If so, you need to remove the AMD drivers from the very root..... every reg entry must go, Nvidia doesn't like ATI one wee bit.
Also, the Blue Blocks and then freezing, could be a heating up issue, use a utility like HWMonitor to monitor temps of the card while you putting load on the GPU.
To clean up AI/AMD drivers use a utility called DriverSweeper to clean out the drivers completely.
Then download a fresh copy of the Drivers from the Nvidia Site and install them , not from the manufacturer, but from Nvidia themselves.