Today I had a problem where random spikes appeared all over my screen. It happened randomly while walking around the map in a non-crowded area. I was the only player nearby. After a reboot, the problem remains.
The problem: http://a.imageshack.us/img832/3832/image38.jpg
I ran the FFXIV benchmark and the problem is there too. I have tried running FurMark as someone suggested and it runs fine. I have tried running Tiger Woods 2008 and it runs fine. Unfortunately that's the newest PC game I own besides FFXIV beta and it's hardly graphical intensive. I re-installed the latest ATI driver and that didn't fix it.
Is there anything I can run to try figure out what the problem is? I have a Radeon HD 5830 card. The game ran fine last night and Sunday night. The benchmark also ran fine a month ago no matter how many times I ran it. The only thing I've done since last night was install the C++ 2010 pack as that apparently solves a crash issue.
XI Wiki

