ML350 G6 Memory Configuration

[madlog]

Hello,

we tried to upgrade our memory in a ML350 G6 Server (2 procs).

Starting point:

P1 - Slot A+B+C: 16GB QR PC3-8500 Reg CAS 7 installed

P2 - Slot A+B+C: 16GB QR PC3-8500 Reg CAS 7 installed

We tried to install 2 new modules (16GB QR PC3-8500 Reg CAS 7) at Slots P1 D and P2 D. After this we got errors an the complete channel (P2 - 1) and the memory was not allocated.

We removed one module from P2 - D and it worked.

We removed the module from P1 - D and installed it to P2 - D and it worked.

Then we tried to install only two new modules in P1 - A and P2 - A i also get an error. I had 4 new modules and at every constellation i got the same errors.

€dit: AMP-Mode: Advanced ECC

Any advices?

Thanks!

[waaronb]

You should check the quickspecs page to make sure, but I think on the G6 models, there's a maximum of 8 ranks per channel. Since you're using quad-rank DIMMs that means you can only have 2 of those per channel and then you reach that 8 rank limit.

[madlog]

I checked all ressources and you can see that i used only 8 ranks per channel.

[waaronb]

I'm sorry, I guess I didn't understand at first how you were adding the memory.

You mentioned installing the memory in slots A, B and C for each CPU which seems correct. Then you added 2 new modules into "D" for each processor and the one on CPU 2 had an error.

When you swapped new modules between CPUs, the problem followed a particular memory module, so it sounds like that one module is bad.

You could remove all of the memory and just install one module at a time until you find the bad one, and it's probably the same one that you originally installed in CPU 2 slot D. That's my guess. :)