Help with overclock please

[welshbloke]

Motherboard:- Abit an8 ultra (NF4)
Cpu :- A64 3500+
Memory :- Gskill PC3200 2-3-2-5 Dual Channel

I can get my cpu up to about 2.7GHz prime stable, but am a bit confused with my memory settings.

By my calculations setting my memory to ddr333 in the bios with my HTT at 240 should give me a memory frequency of 199.8 MHz (333/400 *240=199.8).
Well cpuz (and everest) say my memory is running at 188.8 MHz.

I'm obviously missing something here, anyone fill me in please.

 

[welshbloke]

Gagh!
Just worked out that the memory freq isnt worked out like that.

multiplier * (1/memory divider)= X

core speed/X =memory freq

so.....

11*(6/5)=13.2 (round up to 14)

2643/14=188

Cool!

unfortunatly it means I'll have to hit 2.8 GHz to get my memory to run at 200 MHz

Not that it's going to make a big difference but its the principle!