i run a athlon xp 1900 (1.6 ghz) on a Asus A7v266-E mobo (with 1024 ddr). when i boot my computer, it never works on the first try. when it does come on, my CMOS settings never save. it ALWAYS says "last time the computer hanged for an improper CPU speed". i cannot run it at 1600mhz cause it wont ever finish booting wihtout locking up, but when ever i set it to a different speed, i get the improper speed problem. on top of that, when ever it does decide to work, (like once out of 10 tries), i can only have it on for like 15 minutes before i get a "PHYSICAL MEMORY DUMP" error or a "IRQL_NOT_LESS_OR_EQUAL. im so frusterated. and my cdrom stopped working today :(. lol help!!! and yes my mobo supports xps

BIOS update?

There could be 2 problems... 1) Your Bios needs updating as Maybe stated. 2) Your CMOS battery is failing. Check for both. Tank863

okay. ive downloaded the latest update, but how do i go about installing it? sorry ive never done it before.

oh nevermind i know :)

if the above ideas don't work, the next thing i would try and it work for me, replace the power supply, with my system i got the PHYSICAL MEMORY DUMP" error . i tryied everthing, then i replced my power suply with a good bran name wowow randy2

Switch to a Duron CPU or go with Pentium 4. That will correct ALL your problems unless your Athlon 1900+ already destroyed your mainboard.