Please confirm these 3 BIOS settings are stable - DDR2 4 sticks

[PaulDD]

Edit: On a whim I tried putting one matching pair on one channel (2 different coloured slots) and the other pair on the other channel - which is against the common recommendation and against what the motherboard manual says to do,

 

and now all 4 sticks boot up properly at the full 800MHz with the correct timings, all on auto settings. My RAM voltage reads 1.92v. Passes memtest and seems stable so far.

 

I'm left wondering if it was a resetting-CMOS issue, or just a quirky memory permutation issue. I'm not going to experiment any more though because it's working. If I get any instability I'll try slightly upping the voltages.

 

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Hi, an old post by RAM GUY recced the settings below for my situation (but diff size memory).

 

Would be great if someone could confirm these apply to me, and check that the timings are spic and span as well.

 

- 4 sticks of XMS2 CM2X2048-6400C5 (5-5-5-18)

- 2 sticks are labelled 1.8v, the other 2 are labelled 1.9v (but both version 3.1)

 

They pass memtest after changing the settings, but before that I couldn't even boot with all 4 sticks at once - only 2 at a time.

 

Specs:

- Motherboard Gigabyte GA-MA770-DS3 (rev. 1.0)

- Phenom X4 9850 Black Edition BE 125W

 

 

Following a RAM GUY post for the same situation (but with 4GB sticks instead of 2GB):

 

- I upped RAM voltage from 1.8v to 2.0v

- I upped Northbridge from 1.2v to 1.4v (not too high?)

- I downed memory clock from 800MHz to 667MHz

 

Are these 3 settings right and all I need to set?

 

And timings are left on auto - is this ok?

 

 

(The labelled timings are 5-5-5-18. Now the new timings are 5 5 5 15 19.)

http://i76.photobucket.com/albums/j15/zebrapics/cpuid_zpsngaz1z0n.jpg

 

Thank you.

[PaulDD]

Solution found - as explained in edit.