B200 M3 memory stuck at 1333 MHz in performance mode

Hello

We have 2 B200 M3s in a new deployment running 2.0(3a). The B200s are configured with 64 GB using DIMMs of 8 GB, using BANK 0 of each channel. We deployed a policy of BIOS specifying performance for LV DDR mode and confirmed this setting takes effect in the BIOS, but the memory continues to run at 1333 MHz. When we look at the inventory server, the DIMMs are reported as 8GB 1600 MHz DIMM dual rank. We tried forcing the DIMMs in mode low voltage and return to the mode of performance without result.

In other UCS environments, we have deployed these same blades with the same configuration of the memory and BIOS policy and had no problem getting the RAM at full speed. We do not use any kind of power is corking.

Thoughts?

Hi Brad,

What is CPU?  support for the B200-M3 CPU 3 do not support the 1600 Mhz:

http://www.Cisco.com/en/us/docs/unified_computing/UCS/HW/chassis/install/B200M3.html#wp1028500

Mike

Tags: Cisco DataCenter

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