[Beowulf] 8 ranks of DDR400 and Opterons (was: Tyan 2882)

[Gebhardt Thomas]

Hi,

On Thursday 28 September 2006 17:57, serguei.patchkovskii at sympatico.ca wrote:
> very fine-grained control over memory timings - from just choosing the
> specific SPD profile to completely overriding the SPD. Either one of: a)
> downclocking the DIMMS to 183MHz; or b) overriding the CAS to 3.0 gave us a
> rock-stable system - but for a while this was extremely puzzling ....

our BIOS slows down the memory bus to 166MHz when all slots are populated.
Don't know about the CAS latency, however.

Thanks, Thomas