slow ram timing on p4p800?

[munchow2]

I am a little bit confused about the Ram frequency on my computer.

It is the rig below but now I am trying to OC the ram a bit.
I did manage to get it down to 3-3-3-7 from 3-4-4-8 which isn't much but I noticed that the frequency was 153.5 mhz. I have pc-3200 ram so shouldn't this read 200 mhz?

How would I go about to change the frequency?

 

[Lord Evermore]

Your P4 is a 533MHz bus processor. On a dual channel mainboard, the proper speed for memory would be 133MHz, DDR makes it 266, dual channel makes it 533MHz of effective speed, matching the processor bus speed. You've overclocked the frontside bus to make the processor run at 3.2GHz, which has automatically clocked the memory at a matching rate.

Just because your memory is rated at 200MHz doesn't mean it MUST run at that speed. By running it at a lower speed, you actually give yourself more headroom to reduce the timings. I'm not sure if your mainboard supports having the memory and frontside bus running at different speeds, but there's not likely to be much performance to be gained by it in this case. If it is possible, it will just be another option. Read the manual regarding the BIOS settings.

 

[munchow2]

Thx for the advice.

Actually my proc is fsb 800 apparently. I ended up clocking the ddr to ddr320, OC'ed the cpu fsb to 230, and this brought my ram frequency to 185mhz. Although the ratio is 5:4, it seems to be running stable. There's was no way I could run 1:1 and have it stable in applications depite having bumped the ram to 2.85V. So i left it as ddr320 @ 2.5-3-3-7

 

[JEDIYoda]

Originally posted by: Lord Evermore
Your P4 is a 533MHz bus processor. On a dual channel mainboard, the proper speed for memory would be 133MHz, DDR makes it 266, dual channel makes it 533MHz of effective speed, matching the processor bus speed. You've overclocked the frontside bus to make the processor run at 3.2GHz, which has automatically clocked the memory at a matching rate.

Just because your memory is rated at 200MHz doesn't mean it MUST run at that speed. By running it at a lower speed, you actually give yourself more headroom to reduce the timings. I'm not sure if your mainboard supports having the memory and frontside bus running at different speeds, but there's not likely to be much performance to be gained by it in this case. If it is possible, it will just be another option. Read the manual regarding the BIOS settings.

too funny! Actully as was stated it has a fsb of 800mhz......
good info though....