I just installed a new 4870 and after this HD sentinel reported 50% drive performance and the system was dragging bad. I restarted the system and its back at 100%. I start to defrag and then watch HD sentinel... it drops to 50% after 5 min. The system begins to drag again. I benchmark the drive and it has the same benchmarks as it always gets and feels fast again even tho it says 50%. It will get so slow it will struggle to launch firefox. This is with a Raptor 150X, Abit IP35-PRO in win XP. ANy ideas? Is there any newer firmware for the drive?