what hard drive will work with this mobo: asus p4p800se

Either Ide or SATA will work with that mobo, but if you go with a sata hard drive you have to flash the bios using a 3.5 floppy.

Maverick, I have a ASUS P4P800, and I have two Seagate Barracudas (250GB 7200rpm SATA), which have been running in my PC without a single problem for over three years. I don't know anything about NCIX, but there's a similar Seagate drive here.

The only BIOS change I recall is setting Enhanced Mode Support (P-ATA + S-ATA) in the IDE Configuration window (in BIOS) after installing both drives.

One thing I did discover is that on the MB the SATA plugs are numbered; SATA 1 and SATA 2. I discovered this when one of the drives did not appear in My Computer and I had to get in the case with a flashlight and a magnifying glass. The printing is very small but right next to each SATA plug on the board. I realized this was sort of like the IDE equivalent of Master and Slave, so I hooked my main drive up to SATA 1 and the second drive to SATA 2 and everything was peachy.

Make sure you enable S.M.A.R.T. for both drives if you want to utilize that feature. I find it comes in handy sometimes. You need at least Windows XP with SP1 for SATAs to work.

In my manual there is a detailed section on installing SATA drives. If you don't have a manual for that board you can download the PDF version off the ASUS site.