Hey there, I found the fix figured I'd share it with you. Little info first, I got the new bios, 2001, and flashed it. Rebooted and it gave me the option of up to 20x multiplier so I shot for 12x just to see. booted into windows and sadly it was still stock. Tried using the AI overclocker in windows to go to 11, rebooted and it bumped it down to 6x! Checked the bios and it's back to 10x max.
So I got motivated to find the solution and long story short here it is:
Download bios V 1506 from here:
ftp://anonymous:*****@dlsvr02.asus.com/pub/ASUS/mb/socket775/P5W%20DH%20Deluxe/P5WDH1506.zip
Then get an EARLY version of Asus Update, v6, here:
ftp://anonymous:*****@dlsvr02.asus.com/pub/ASUS/mb/flash/AsusUpdt61002.zip
Start Asus update and go to Options, check "Bios downgradable" then hit next to save. CLOSE THE UPDATER! Then reopen it and do the "normal" reflash with v 1506. This time it'll let you! You're golden from there, I'm running a "weak" 2.94ghz on an 11x right now.
Good luck!