S!
Have not noticed any stripes so far and also the strange anomaly at the edge of draw distance with better textures is smoother. Clearly visible now over France but less so over England.
As of overclocking..even the 2500K does it nicely I am not very keen overclocker anymore. Too much fiddling around. Sure maybe a few MHz could help, but I want to OC only the CPU in that case as 1600MHz DDR3 should be fast enough.
As of testing other games...World of Tanks ran great. GTA IV had a strange anomaly, it let me play only in 800x600 because I was at "edge of running out of resources"..WTF?! 200mb of 3Gb used and game says no resources?! Now how I can reset the game settings to get it to work again..
Anyways..back to testing. Last night took a quick swing at a Repka dogfight server. Ran smoothly without stuttering, so very nice