nateman_doo
sata.
posted in general forum too.
http://forums.evga.com/tm.aspx?high=&m=164052&mpage=1#164078
I am pretty sure that you won't get the XP install to work on your SATA drive without slipstreaming the SATA drivers to the XP install. Either that, or put the SATA drivers on a floppy disk (if you still have a floppy drive somewhere). I didn't have a floppy drive and couldn't install XP on my 780i due to SATA drivers. I never did the slipstream method and therefore never got XP to work on my 780i. I am pretty sure your 790i will be similar.
But right now, I doubt the lack of SATA driver is keeping you from at least starting the install. You should at least get to the drive selection part of the install before the lack of SATA driver becomes an issue.
Something else, something else.
I would definately research slipstreaming and then slipstream a disk with all your chipset drivers including SATA driver and SP2. You will want those items anyways and they just may solve your current issue too.