This is a tricky one

Right this is the problem:

PC stutters every now and then, it will mini freeze for like half a second every few seconds for say a minute then be fine, some times it will then completely freeze after a min of this or carry on and be fine. then after the restart it will halt on the SATA drive boot up and sometimes say disk read error. if i disconnect any sata drive and reattach it boots fine

What i Know:

I have run mem test and tried running on 2 different sets of ram, iv tried a differnt PUS, iv tried win 7, vista, linux and XP and still does the same. iv loaded my OS onto a RAID 0 2 x 500 GB WD first, but now my win 7 is loaded onto a single 1TB WD HDD, iv run disk checker on all the drives but none have errors.

i thought it was just one hard drive playing up but if i seem to run the PC on like 2 HDD's it seems to behave if i add another 1 or 2 into the mix it seems to cause the problem.

so really confused lol

any suggestions?

Stuttering during heavy load is normal for some games. You may have to drop the resolution setting to get rid of it. List your complete system specs for more help.

Check your device manager under "system" in the control panel for any conflicts, which will have a mark next to the device. You can have windows update the driver, or uninstall the device and reboot if you have the driver on the motherboard cd.