Name: akratz1 Date: August 30, 2006 at 14:44:24 Pacific Subject: OCing a dual core 3800+ OS: windowsxp w/sp2 CPU/Ram: AMD 3800+ dual core/ OCZ Model/Manufacturer: Home Built
Comment:
I'm new to overclocking but i think i know what im doing. I belive the concept is to up the fsb untill your system fails then ether drop it down or raise the voltage to try and get more. Well as soon as i get above a fsb of 210 mhz mine fails. I've read reviews were people hyave this same cpu oced to 2.5 to 2.6 ghz. Why cant I get mine over 2.1, my motherboard is a abit AT8 32X
I'm really not familiar with ATI based boards. Boards based on the nForce4 Ultra (or SLi) are the best boards for the S939 A64 or X2. Actually, the 3700+ San Diego would have been a much better choice than the X2 3800+...it's cheaper & faster.
Technically, the A64 doesn't have a FSB. It uses a HyperTransport bus which is designed to run at 1000MHz & it doesn't tolerate much overclocking. So before raising the CPU frequency, you have to lower the HT multiplier to 4x...that way, the HT bus won't overclock. You'll also need to lower the RAM speed to 166MHz (DDR333) & lock the PCI-E bus at 100MHz. Once you've done that, you *should* be able to raise the CPU freq to 250MHz without any probs.
How do I low the HT multiplier? Can;t find anything like that in my bios. Plus after a slow down my ram and this HT bus am I even gonna have a faster/better gaming system
Ok your mem will follow the same speed that you set the fsb too your only slowing the mem down so you dont over do it on it and bottle neck the system. which i am sure your mem is pc3200 DDr400
The slowing of the HT is so you dont fry the chipset it is already running at 1ghz soo we wanna lower that too make the HT even out at 1ghz with over clocking the FSB.
