I am trying to setup a Dell Poweredge R 720 server( Dual Intel Xeon E5-2640 2.5 Ghz 6-Core CPU’s) with 48Gb Ram (12 x 4Gb PC3L-10600R). My question is regarding the placement of RAM in the DIMM slots for maximum performance. I believe this Dell R 720 server has 24 sockets (slots). So each processors is allocated 12 sockets. The 12 sockets are then divided into 4 memory channels, meaning each channel has 3 sockets (slots) allocated. ( White, Black and Green coloured)
I want to use 48 GB (12 * 4 GB RAM) in this server. It would mean i will use 6 sockets per processor. In each individual processor it has 4 memory channels. From the memory configuration guide i can see that single rank RDMIMM can be populated on 3 sockets per channel. So i can fill up channel CH0 and CH1 CH2 and CH3 white sockets on for CPU 1 and CPU 2. The remaining 2 DIMMS will be used on Black Sockets for each CPU for Channel 0 and 1 for CPU1 and Black socket for CH2 and CH3 for CPU2.
( Processor 1 - A3, A4, A2, A1 and A5 AND A6
Processor 2- B3, B4, B2 , B1 AND B7 AND B8)
Please correct me on this and let me know that i will be utilising the full potential of the memory and processor by having this placement.
Second part of the question is related to the processor Dual Intel Xeon E5-2640 2.5 Ghz 6-Core. This processor has a memory bandwidth of 42.6 GB/s. Does that mean the processor can support maximum RAM of 42.6 GB/s for the 4 channels allocated on the motherboard. This cant be right as this server can support upto 384 Gb. Can someone explain where im getting it wrong on this. Thank you 