Alas, I also have NOT had any luck with raid0 configuration (Q6600 on ASUS P5K Deluxe) with my 2 WD Raptor 74GB drives...
Intel Q6600 (B3) @ 3.0 GHz with stock cooler
ASUS P5k Deluxe Wifi AP
2 x 1GB Patriot Extreme Performance DDR2-800 (rated 4-4-4-12)
NVIDIA GeForce 8600 GT dual DVI (fanless Gigabyte SilentPipe II)
Antec Sonata III with Earthwatts PS
Seagate 500 GB sata/300
Windows Vista Home Premium 64-bit (utterly awful OS)
addt'l low speed internal chassis fan for cooling the chipset, DRAM and GFX card
I am currently using BIOS default jumperless settings "AUTO" with only the following exceptions:
CPU FSB 333
DRAM Memory Freq 1000
DRAM Timing 5-5-5-15
DRAM Voltage 2.2
Firstly, system runs blazingly fast and stable, and never shuts down. It is also reasonably quiet. I observe 50 degree core temp readings using the ASUS PCProbe (which I understand from this forum may be seriously underreporting the actual temps). Sad to say, my Vista experience has been an unbelieveable drag: virtually nothing installs or works first time. Always lots of fiddling, system updates that continue to reinstall themselves, compatibility issues, etc.
Tried like hell to get my pair of WD raptor 74GBs to play with this ASUS board, but each time I configured them (ie fresh install of Vista) the intel controller would report "drive errors" within a day or two. These drives continue to work just fine back in my old MSI Neo-FSR with a Via controller.
Tried to get two different HDTV subsystems to play with Vista's Media Center with no luck: KWorld's Conexant based PCI 120 HDTV card and Pinnacle's brand new USB based Ultimate HDTV stick - which both claim Vista compatibility. Gonna keep this system in the office where i look at stock charts, but have decided switch to Apple for the living room.