CPU supports PC6400, I can acquire some PC8500 - will they work together?

CowboyTony · 31 Dec 2009 at 15:32

Hi all,

my AMD 5600+ processor only supports PC6400 RAM, however I have access to 4 GB of free PC8500. Will they be compatible (maybe running at 800MHz instead of 1066MHz) or will it just not work. Motherboard will support the PC8500 fine. Will I need to do any bios tweeks?

jrwagh333 · 31 Dec 2009 at 15:42

I have a 6000+ and it only supports up to 800mhz. But my MoBo supports and my RAM is 1066mhz... It just ran the memory at 800mhz.

What I did later on was up the FSB/HTT of my CPU and lowered the CPU Multiplier. This made my RAM run at 1066mhz but left my CPU at stock speeds

CowboyTony · 31 Dec 2009 at 17:10

excellent, thanks jrwagh333

CowboyTony · 4 Jan 2010 at 16:03

jrwagh333 said:
I have a 6000+ and it only supports up to 800mhz. But my MoBo supports and my RAM is 1066mhz... It just ran the memory at 800mhz.

What I did later on was up the FSB/HTT of my CPU and lowered the CPU Multiplier. This made my RAM run at 1066mhz but left my CPU at stock speeds

I've tried doing this and couldn't get my system to boot. Perhaps I got my math wrong or my understanding of how to overclock RAM is completely wrong, can someone help me determine what my settings should be, please?

I increased FSB from 200 to 266 (my reasoning being that 1066MHz is 1.33x800MHz) and lowed the CPU multiplier from 14.5 to 11 (giving a cpu speed of 2926MHz instead of the standard 2900MHz. I also lowered the HT link to x4 instead of x5 so it was @ 1064MHz instead of 1000MHz.

Thanks in advance.