What OS? I would do the following if it is XP: Go to Run>type Msconfig: go to startup and remove eveything from startup but your antivirus/antispyware and systray. Defragment the drive. When this is done go to control panel>System>Hardware>and remove the secondary IDE channel. (make sure you have your original mobo CD with the IDE and chipset drivers) windows may just find the secondary IDE channel without drivers but you may need them so make sure you have the mobo cd or download the drivers from the web (once the secondary IDE channel is removed-reboot)once the esecondary IDE channel has been reinitialized, right click on the cd and go to properties and make sure that DMA is enabled and the hardware acceleration slider is set to max. Hopefully it's XP because if you have 98se or ME you may have to reformat and reinstall windows.
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.