OPTERON 144 UNSTABLE with 4x512MB of OCZ PC3200 REV2

[amorak]

Hey guys,

I had my Opteron144 completely stable @ 2.8GHz with 2x512 of my OC PC3200 CAS2 REV2 DDR. However, I bought another pair of the same RAM and now the computer shits itself whenever the RAM is over DDR333 (166MHz). I have heard from several sources that the Opterons are no good for over DDR333 when you have more then 1GB of RAM - is this true?

If not, what can I do to get some stability? My f*cking ASROCK 939DualSATA2 board has dividers for the RAM down to 2:1, so teh DDR is @ 100MHz when the FSB is @ 200, but from there oon up it increases at a 1:1 ratio, so when I am @ 266FSB I am @ 166MHz FSB, the top end of stability for the RAM...

Any ideas?

Thanks!

 

[5t3v0]

Opteron 144s have the rev E4 memory controller so should support 4 double-side modules @ DDR400 but only at the 2T command rate. You have checked the command rate is set to 2T?

 

[amorak]

Yes, I have confirmed a 2T command rate.

Any other ideas?

 

[GMtheBest]

OCZ changed the ram chips in their REV2 memory modules from TCCD to TCC5. You could have 2 different types of ram in you system which could be causing your issues. Look very closely at the lables on each module and see if they say ver 1.0 or V1.1 in very small writting. If they differ in version, then you have different memory chips.