just a heads up.
i went through 2 rma's with raptor 36-sys not seeing them but seeing new sat 'cuda. upgraded to 74 raptor & comp did not 'see' it either. was getting to forget the whole raptor thing when i had an epiphany!

i have an asus p4p800 board & had the agp/ide divider maxed out. turned it down to middle setting & a miracle! my raptor suddenly appeared!.
this of course is after i paid expedited shipping on the 1st one & went through the hassle of 2 rma's & paying the extra $$ for the upgrade to the 74gig vers. & the time & hassle involved.
so if you are oc'ng & have a hd prob. check that divider out 1ST!
bty the raptor is awsome!! did not think i would really notice any real improvement. surprise!! boot up is faster & everything seems just a little smoother. & as far as handling big files/ defrag no comparison.
the jump i got going from 5400 hd to 2nd gen 7200 was minor at best. these drives rock!!(as long as you do not oc them too much

)!