PlunX, So far all day, the KA266 RAID has been an awesome, stable mobo! I am not using RAID right now, so I cannot comment on that, but the onboard sound is incredible. I threw in a loctite unlocked Duron 750, 64MB retail Radeon, ATA66 IBM 15GB hard drive, and a Acer 50X CDROM. I am still learning to tweak the BIOS and DDR RAM settings.
Right now, I have the 750 set at a 133/133 CPU/DDR Clock, memory set at Ultra. (It still has another Ultra2 setting past that I have not tried yet.) It is POSTing and running at 1000MHz. It is rock solid, looping the 3DMark2000 demo as I type this, and have looped the Q3A Demo for awhile before that. I flashed to the latest BIOS and drivers.
What surprised me is that the cheap PC1600 Crucial DDR RAM (256MB for under $100.00) is doing fine at the default PC1600 voltage at 133. Here are some early benchmark #'s:
750 Duron @ 1000 133/133
Sandra CPU....2831/1381
Sandra MultiMedia....3322/4615
Sandra Memory....522/759
I still have more tweaking to do, and it is hard to tell how much more I could get out of it. Hell, I have not even tried to underclock the Duron and really raise the FSB yet!
I will be doing some Content Creation Winstone 2000 tests soon, after I figure out some better tweaks. It seriously looks like this board is going to find a home in my primary box, and my KT7AR put on backup system status if things keep going as they are.
I can't imagine what my 1200 T-Bird will do on this IWill board. If the RAID functions as well or better than the Highpoint, I will (lol) be a happy camper. I have not been this impressed with a mobo for awhile, and I have built a bunch. I'll keep you posted on my further progress later. (It looks like another Mountain Dew Night

)
EDIT: This KA266-R also supports up to
3GB DRAM