Windows 7 sp1 high cpu usage (35%) - high system interupts

I just installed windows 7 ultimate sp1 - Like the title says I'm seeing 35% cpu usage with nothing going on. I googled around and ran traces to see which driver it was, turned out the ahci driver was doing it. The USB driver showed similarly high latency but that can be delt with later.

Has anyone had this problem? Most forums recommend upgrading your drivers but this problem has stayed constant both with microsoft's stock drivers for everything and after running windows built in search for drivers... even after I manually grabbed the latest drivers for everything. Any ideas/help would be much appreciated.

Intel E6750
Asus P5Q Pro Turbo - BIOS is up to date
4 GB RAM - Corsair something or other
EVGA Geforce 8800 GT
450W psu
1 DVD burner (sata)
5 hard drives (sata) plugged into all but the first sata port because that caused nothing but headaches for me.

Update - switching from AHCI to IDE in BIOS fixed the problem. The problem now is figuring out how to fix it, I'd like to continue using AHCI if possible. Any ideas?
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More about windows high usage high system interupts
  1. Does it seem any slower? Do applicatons take longer to load? If the answer is no to both of these do not worry about what the cpu tests/meters say. If applications take loger to load go tweak the visual affects. Also make sure that you have the computer on high proformace. If you do not know how to chage it check out my video at:
  2. No that's not the problem.
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