I accidentally brought up the extended BIOS menu on my P4S533 's BIOS yesterday. ASUS P4S533 VX board has a very limited BIOS. One way to bring up the extended BIOS is by taking out all of the RAM from the motherboard, then switch on the computer. Wait till the missing memory's beeping sound (about 4 to 5 beeps), turn off the computer, put the RAM back in, start the computer, go into BIOS and BAM !! extended BIOS. I dont know if there's another workaround for this, but i did heard you'll get the same result if you take out the battery for like 10 seconds. But as far as i know, taking out the battery is a good way to erase the CMOS :S
Although i am finally able to get more options in the BIOS, theres not much that i can do. The only useful thing that i did was playing with the AGP aperture. My mobo doesnt allow me to change the voltage allocation to the system. I was planning to increase the voltage to RAM etc, too bad it's not there.
I'm still waiting for the new power supply. Oh and a new hard disct hat i bought an hour ago from Newegg. WD 80 gb/ 100 ATA 7200 rpm. Pretty good for a 50 bucks HDD.
p/s : WARNING : Newegg.com >> where you buy all your hardware needs. Neweggs.com >> Where you buy your hard-on needs ?