7900gt problems with core ram clock speeds and preformance

[Lord Ziplock]

okay when i first loaded it there was a small blimp of it going up but then it returned to the lower setting... however after one test it did go up let me check it in rivatuner

 

[Lord Ziplock]

but why the low scores and before it didn't change during 3dmark guess something changed with the drivers i will need to do some more benchmarks
thanks again