Del power edge T310 memory problem

Mazeem,

What are the specs on the dimms you have installed, are they RDIMMS (Registered) or are they Udimms (Unbuffered)?

There are two channels available, with up to 2 U-DIMMs or 3 R-DIMMs per channel. The requirements for those are :

RDIMMs and UDIMMs cannot be mixed.

Except for memory channels that are unused, all populated memory channels must have identical configurations.

Memory modules of different sizes can be mixed in A1-A3 or B1-B3 (for example, 2-GB and 4-GB), but all populated channels must have identical configurations.

1,3, and 5 are channel A

2,4, and 6 are channel B.

Chris , Thanks for your support 

Here is the specs of the DIMMS installed:


4* 4GB :

• Kingston Technology Part No.: KTD-PE310Q/4G
• Upgrade Size: 4GB
• Memory Kit: 1x 4GB
• Module PIN count: 240-PIN
• Memory Generation: DDR3
• Module Speed: PC3-8500, DDR3-1066
• MHz of Module: 1066MHz
• Latency of Module: CL7
• KTD-PE310Q/4G DIMM Type: RDIMM, ECC REG, Registered DIMM
•  
•  

1*8GB :

• • Kingston Technology Part No.: KTD-PE310Q8/8G
  • Upgrade Size: 8GB
  • Memory Kit: 1x 8GB
  • Module PIN count: 240-PIN
  • Memory Generation: DDR3
  • Module Speed: PC3-8500, DDR3-1066
  • MHz of Module: 1066MHz
  • Latency of Module: CL7
  • KTD-PE310Q/8G DIMM Type: RDIMM, ECC REG, Registered DIMM

and installed as follow

As the previous installation the server reads 8 GB only ,  it should read total of 24 GB but it comes out with error of wrong distribution of memory”Memory Configuration is not optimal” and reads 8 GB only -.
However when removing the 4 GB from slot DIMM A3 (5) it reads 20 GB successfully,

Waiting for your reply

"Memory modules of different sizes can be mixed in A1-A3 or B1-B3"

... in your case, 4-GB and 8-GB

"But all populated channels must have identical configurations"

... meaning that channel A (slots 1,3,5) must have the same configuration as channel B (slots 2,4,6).  In this case, the configuration of channel A (3 DIMM's) is not identical to channel B (2 DIMM's).  It may be able to handle different size modules, but the configurations must be balanced.  Sounds like you can do 20GB with the DIMM's you have or get another 8GB DIMM and do 32GB.

The reason you are having issues is the configuration across both channels isn't matching. What you can do is add another 8gb dimm and place it in B1. That will allow you to max out the server at 32gb. You can't have a dimm in A3 and not one in B3. The A's have to match what the B's have installed.