Here's a blatant copy and paste from Paulcs at MURC
<< The P3V4X has some idiocyncracies. If you buy this board, no matter what video board you're using, you should use the VIA 4.03 AGP driver. The 4.02 driver is included in the 4.22 4in1 set, so you must download and install 4.03 driver separately.
After you install the 4in1's, check you disk drives in device manager. If your hard drives are identified as "GENERIC IDE DISK TYPE47," your busmastering drivers did not install properly. Just install them manually from device manager.
The P3V4X likes fast RAM and hard drives. I found it was best to connect an ATA-66 hard drive to the first IDE channel. Performance is greatly enhanced by CL2-rated PC133 RAM. Let SPD set the timings.
When you turn on your system for the first time, note carefully the BIOS version. If your board shipped with BIOS 1002, flash it immediately. The board did not function properly until 1003. I know Sanjuro has had good luck with 1005, the latest.
Good luck.
Paul
>>
The reason why I knew right where to find it is because this post helped me take care of the same problem with my MSI 6309. I reinstalled drivers from Device Manager and the HD's are now reported properly.
Good luck.