Overclocking question.

[imported_hopeless]

I get that uping the fsb will increase the speed of the cpu. What I'm still not getting is how this will effects the ram. I've read about a ratio setting but my mobo bios doesn't seem to have one. It does have three different speeds that the memory can be set at, the highest is 400 Mhz. I believe the other 2 correspond with PC2100 & PC2700.

 

[Killmenow]

Hmmm. Im somewhat of an oc nub......but ill try my best to explain. Much like the CPU, the frequency of the ram is also directly related to the fsb. The CPU is quad-pumped so 200fsb (X4) -----> 800mhz fsb. DDR ram is fsb (X2) so 200fsb (X2) ----> 400 Mhz, or PC3200. In your Bios, the 3 available memory speeds you select are basically the memory ratios. (400Mhz = 1:1 333mhz = 5:4 266Mhz = 3:2) The frequency of your ram raises 2mhz for every 1mhz raised in the fsb. So basically, when you overclock your CPU at a 1:1 ratio, your ram will overclock with it. If you changed your ratio by setting your memory speed to say......333mhz, then @ 225FSB 1:1, you ram will only be at 360 mhz instead of the 400mhz at stock, or the 450mhz @ 225fsb.......this allows you to overclock your cpu without having you ram limit the overclock. With your ram, I would try to raise the letencies and voltage and stick with the 1:1 ratio......this is usually better than low-latency-non-1:1. If im wrong about anything, fell free to correct me........after all, i might just be crazy 😛 hehehehehhe

 

[Fern]

Originally posted by: hopeless
I get that uping the fsb will increase the speed of the cpu. What I'm still not getting is how this will effects the ram. I've read about a ratio setting but my mobo bios doesn't seem to have one. It does have three different speeds that the memory can be set at, the highest is 400 Mhz. I believe the other 2 correspond with PC2100 & PC2700.

When you up the FSB, it increases the speed of both cpu & ram at the same time.