Hi Ward,
On Wed, Sep 2, 2009 at 3:14 PM, Ward Vandewegeward@gnu.org wrote:
Hi all,
I'm having some problems with a supermicro h8dme board with 2 K8 processors and 64 GB of ram.
Sadly, the ram is of two types (that was not my decision :/). We have 8x 4GB Samsung M393T5160QZA-CE6 and 8x 4GB Kingston KVR667D2D4P5/4G. Both of these types of ram are dual rank DDR2, 667 MHz, CL5, 1.8 V, registered, ECC.
The memory is installed like this:
BANK CPU1 CPU2 1B KING KING 1A KING KING 2B KING KING 2A KING KING 3B SAMS SAMS 3A SAMS SAMS 4B SAMS SAMS 4A SAMS SAMS
With the proprietary BIOS, this setup works perfectly. That said, the manual for the board does say it's not recommended to mix memory types. Our system integrator mentions that when 16 banks are used, the memory runs at maximum 533MHz.
As we talked about, it looks like the memory is sized correctly and the next thing to try forcing the memory speed slower. 8 dual rank dimms (16 banks) s[eed limitation might be spec'd or errata. A check might need to go into the main k8 mem init code.
Marc