Memory Timings- Finding/Setting

[Comdrpopnfresh]

What is a good way to find the extended memory timings and profiles? Software? Net reference?

I've got crucial ddr2800 ballistix, but my motherboard doesn't recognize or load the EPP's. I know it has one for ddr2-1000, but I only know 5-5-5-15. My bios gives a crapton of memory configuration timings, but I don't know what the base extended timings are for this memory at given speeds.

Also, if one were to use software to alter the profile priorities/order, would that void the warranty, if the timings and voltage are kept within warranty specs?
Are there any reasons not to edit a dimm's profiles if extensive stability testing shows a configuration to be solid?

 

[n7]

Memset for viewing subtimings; click the SPD button for SPD info
http://www.tweakers.fr/memset.html

Everest also shows lots of subtimings under Motherboard > Chipset.

SPDTool allows for modification to SPD
http://www.techpowerup.com/spdtool/
Thaiphoon Burner as well
http://jungle.at.tut.by/

I would strongly advise AGAINST altering SPD though, as you could easily end up w/ decorative useless RAM if you do something wrong or something goes wrong.

I do not see the point for you to alter SPD as primary timings & subtimings can all be set manually in a good BIOS.

Unless you like tweaking forever, it's usually best to just manually set the first four (tCL + tRCD + tRP + tRAS) & leave the rest @ auto.

I'd also try to lower tRD (Performance Level) as low as stably possible as it has a large effect on memory performance, but i don't think your chipset has that option.

 

[Comdrpopnfresh]

I got my system to run @ 5-5-5-15 @ 1002MHz (1000 wasn't available). However, the bios refused to automatically set workable timings. I got it to work, in the end, by using memset, deciphering timings between it and the bios, and relaxing 'directly effects system performance' memory settings one at a time until stable boot/post/load.

What's a bluebook standard for memory stability nowadays? Is the win7 memory diag's enough, or some runs of memtest with specific settings?

Another question that crept up when setting things in bios... is there some translation somewhere between the names for a setting bios gives and the ones a program like memset does? Also, what's with the 'D' and 'S' variants of a same-named setting?

 

[Blain]

What's a bluebook standard for memory stability nowadays?

Are you asking about the JEDEC standards for memory?