CPU overclock works "sometimes"

X1800XTTOP

Hello guys!

I´m overclocking a CPU for the first time ever. Well, i have the AMDX2 4400+ and using the A8R-MVP motherboard.

I found that the CPU at 2.5ghz was stable (did 24h prime95 without any errors). Settings are as follow;
CPUfreq:228
Multiplier: 11
vcore: 1.4V
RAM: limit 183, 2.5-3-3-6 @ 208mhz 2.8V
HTT: 800mhz

My problem is. After every boot where i have turned the computer off (not after a simple reboot).. my cpu freq will do down to 2.04ghz and my memory to something like 168mhz. If i reboot, they get their correct values. The BIOS reads everything correct at all times. Why does this happen?

I dont have any AMD C&Q driver installed (i have the dualcore optimizer installed though). Cool&quiet is also disabled in the BIOS. I also dont have any program that changes these things in windows (i did everything through the BIOS).

I´ve read 2 big guides on overclocking before i tried it myself, but i´ve never read anything about this before.

Also, the "RD 480 HT PLL" setting - its set to "Fast" atm.. is that correct? I have googled for this like crazy but havent found any answer of what it does or should be set at.

Thanks

Edit: whops - this should probably be in the overclocking-subforum instead. So sorry.

Bar81

What PSU?

X1800XTTOP

The Silverstone Strider 600W.

The clocks it "underclocks" to varries depending on what CPUfreq. i use. E.g. when its 228 - it sometimes reduces to 2.04ghz (as i said before).

If i choose 227 - it "only" reduces to 2.19 (i think), and memory to something ~190.

I´ve manually set all settings - nothing is on "auto".

Bar81

Plenty of juice. Seems weird. Latest BIOS?

X1800XTTOP

Yes, latest BIOS.

Bar81

Well, must be something peculiar to the board then. Did you check the stickied thread at the top of this forum? Sorry I can't be of any help. Good luck.

X1800XTTOP

Dont worry, thank you so much for trying - i apprechaite it.

If anyone else knows ssomething i can try.. please do tell.

For anyone else having this problem;
Its a problem with the latest BIOS for the A8R-MVP. The 0402 Bios works perfectly.

To revert back to that BIOS, install the original asus update that is on the CD you got with your A8R-MVP - and then download the old bios from asus.com. Make sure "bios downgrade" is ticked in the optons-page of that program and flash it back until a new bios that fix that issue is released.