mem to fsb - is 1:1 ratio best with c2d?

Soldato
Joined
4 Jan 2004
Posts
20,802
Location
¯\_(ツ)_/¯
firstly spec

mb: gigabyte p965 ds3
cpu: e4300
mem: ballistsix pc5300 2gb
the rest isn't really relevant for now... it's all well cooled tho.

now, I can get this memory up to 500MHz, as I'm running it with 2.2v, with heatsinks and a low rpm fan over the ram. 501mhz, and it won't POST - god knows why... but 500 is fine considering it is rated at 333.

The highest multi from my c2d is 9x, so right now I'm running 333x9 = 3ghz

I can't really get the FSB higher without it starting to stop POSTing I think the limit is my CPU. Anyway, what I want to know is which is faster - running the mem 1:1 with the FSB, so they are both at 333mhz, or running the mem at 500mhz, with slightly looser timings, out of sync...
 
Started off with...

e4300 334 x 9 = 3006Mhz

mem settings:
ratio: 1:1 334MHz
timings 5.3.3.12 2T

OCCT stable

superPi 32mb - 18m41s

everest v2.20.405
mem read: 5903
mem write: 2059
mem lat: 86ns

then...

e4300 332 x 9 = 2988Mhz
BIOS vcore = 1.4v

mem settings:
ratio: 2:3 MHz
timings 5.4.4.15 2T

OCCT untested

superPi 32mb - 17m57s

everest v2.20.405
mem read: 6829 MB/s
mem write: 2406 MB/s
mem lat: 73.8ns MB/s

finally at

e4300 334 x 9 = 3006Mhz
BIOS vcore = 1.40675v - cold booted once

mem settings:
ratio: 2:3 MHz 501MHz
timings 4.4.4.12 2T

OCCT pass

superPi 32mb - 17m37s

everest v2.20.405
mem read: 7264 MB/s
mem write: 2470 MB/s
mem lat: 70.0ns MB/s

Now, I'm not sure weather to tighten my timings more, or push for a few more Mhz... I may try for 340FSB, but the e4300 seems to fall over after that. :(

Also, how to I know what values to try for my mem timings (the ones in the BIOS after 4.4.4.12)?
 
Back
Top Bottom