How did you get just under 5000PPD on a 8800GT?
As you can see I am only getting just under 3000 and my card is OC'd quite a bit as well. I'm using the 174.55 drivers since the newer ones that need the modded inf don't work for me. They say that they work but nothing changes and GPU-Z still reports the older drivers. Which drivers are you using?
"Nothing sucks more than that moment during an argument when you realize you're wrong."