Mixed DIMMs in HP MicroServer Gen8

By | February 8, 2015

Idea is that I have 2x8GB Kingston in one MicroServer and 2x2GB HP the original memories in the second. I was wondering how the 1x2GB+1x8GB= 10GB combination for both servers will work.

I know that Intel Pentium G2020T is Dual-Core: “Ivy Bridge” and has Fast Memory Access, Flex Memory Access.  so should be OK.

Actually I found this from Intel about Flex Memory

Flex mode
This mode results in both dual and single-channel operation across the whole of DRAM memory. The figure shows a flex mode configuration using two DIMMs. The operation is as follows:

  • The 2 GB DIMM in slot 1 and the lower 2 GB of the DIMM in slot 2 operate together in dual-channel mode.
  • The remaining (upper) 2 GB of the DIMM in slot 2 operates in single-channel mode.

It looks like in the flex mode combination, I will have 4GB running in dual channel (2x2GB from each DIMM) and the upper 6GB from the Kingston DIMM in single channel. So only if used more than 4GB you get a degraded performance.

Not bad.

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