Oblivion

Hey all, Just wanted to say, I have been playing oblivion on a quad core computer with only a bit of lag. Installed the game ready drivers today and now its unplayable. I cannot even start the game without waiting 30 minutes for it to load. I downgraded back to the last gameready drivers and I am back playing like normal. The newest driver that screwed playability on my crappc is 576.52 released on may 19th. Just thought I would save some peeps some time, that are on a computer with fewer than 6 cores.