How did you uninstall smart doctor and gamer osd? They do not show up on add/remove programs.
Nevermind I found it. Doesn't seem to help much though.
Just another thread to mention that ASUS SmartDoctor and OSD were causing me grief as well.
I had lots of problems with many games, including stuttering, slow loading textures etc. I've heard other complaints in different tech forums about these utilities. Uninstalling them solved the issues.
My best piece of advice here is to try out MSI's Afterburner utility for your OCing; or just to measure your temps. They have a very good timeline graph. Many of the utility's features work on non-MSI cards.
You might also want to try FurMark just to tax your system to see if your rendering issues are heat related:
After uninstalling that stuff it seems to work much better.