Optimizing RAM Timings ...

[Anubis_386]

Hey could anyone help me with optimizing my RAM Timings .. I've got close to no idea about them so could use someone to point me in the right direction ...

I've got 2x 2GB OCZ PC2-6400 Platinum Revision 2 Kits .. all running around 840Mhz (unlinked from FSB) @ 1.95V ..

Here's a screenie of what Ntune says my current RAM timings are ... (although when I come to changing them I'll do it in BIOS) ..

http://i81.photobucket.com/albums/j238/Anubis386/1684.jpg

So what do you guys think? I'm looking for better performance mostly in benches for pi runs and the like ...

Cheers for any help :beer:

[blackersabbath]

I'm pretty sure that you can change the 6's to at least 5's. The CAS latency might be able to go down to 4 too. tRAS can go down to 15 or maybe even 12 depending on what the RAM can handle.

[jason4207]

You just need to experiment w/ each timing one at a time using benches (everest, 3DMark06, SuperPi), stress tests (P95 large fft, memtest), and see what works best. I used memset and did just that, and then finally found the corresponding settings in the BIOS that gave me those optimal timings upon boot.

[Anubis_386]

Yeh, I've been experimenting (+ I found out what timings its meant to be running at) .. And I'm not all that impressed ..

The RAM is rated for 800 @ 4-4-4-15 (2t) @ 1.9v yet its massively unstable at these timings (even with my CPU @ stock) ..

1 of my 2Gb kits has crapped out (or its just a crap kit .. not happy with OCZ any more) but i've managed to get stable at 5-5-5-15 @ 2.0v ..

Question - My max CPU OC is 3.2Ghz .. with 2GB of RAM this was stable (although the RAM is unlinked with FSB anyway) .. with 4GB though its unstable ... Should I set the FSB and RAM to linked (synchronised) and the CPU multi to 7 and OC back up till I get stable .. or what?

Cheers :beer:

[jason4207]

I don't have any personal experience w/ 680i, but I've read the nVidia chipsets don't like more than 2 sticks. You probably need to up the NB, FSB, or other voltages to try and get 4 sticks stable (if it's possible). The NB already gets pretty hot, though, so active cooling is a must.