Unsolved
This post is more than 5 years old
3 Posts
0
29562
September 28th, 2015 02:00
m610 memory speed
Hi,
An m610 with one E5620 cpu was replaced with two X5660's. The goal: improve memory clock frequency. The E5620 supports up to 1067MHz, but the X5660 goes up to 1333MHz.
We're using M393B5273DH0-YH9 dimm modules. They are rated 1333MHz 4GB modules. We have 6 of these, and in the new configuration they are placed in A1, A2, A3, B1, B2 and B3.
So now we have a cpu that supports 1333MHz memory, we have 1333MHz memory and a configuration (dimm placement) that should support it also. Yet the BIOS lists the memory running at 1067MHz.
I've since increased the memory voltage from 1.35v to 1.5 in the bios, but that didn't help. The BIOS performance settings are at maximum. All firmware is up to date.
Does anyone have any clues as to why this system isn't running the memory at 1333MHz?
DELL-Chris H
7 Practitioner
•
9.7K Posts
•
48K Points
0
September 28th, 2015 08:00
Maxx2020,
The specs of the dimm you have look like one that is supported in the M610. What I would start with is looking to see what revision the BIOS is at, and if it is up to date and current. Also in the BIOS, under Memory Settings, can you verify what Memory Mode is set to?
Let me know.
Maxx2020
3 Posts
0
September 29th, 2015 01:00
Hi Chris,
We're running BIOS version 6.4.0, which is the latest.
The memory mode is set to 'optimizer'.
Best regards,
Max
theflash1932
11 Legend
•
16.3K Posts
0
September 29th, 2015 20:00
Review your configuration with the somewhat incomplete information here:
http://i.dell.com/sites/doccontent/shared-content/data-sheets/en/Documents/server-poweredge-m610-tech-guidebook.pdf
There are normal situations where 1333MHz memory will run at 1066MHz by design (Intel/Dell), although it isn't exactly clear what those situations are from this, but I suspect that is where your issue lies.
Maxx2020
3 Posts
0
September 30th, 2015 05:00
Hi Flash,
Thanks, I did check it (again) but could not find any reasons to explain the low clockrate. The memory frequency is determined by a variety of inputs:
Speed of the DIMMs
Speed supported by the processor
Configuration of the DIMMs
All three seem to be fine. Maybe the system tests the memory somehow during POST and concludes the dimms are not of the right kind/type? Is there a way to check this, a log somewhere perhaps?
Best regards,
Max
theflash1932
11 Legend
•
16.3K Posts
0
September 30th, 2015 08:00
I'm not familiar with a way to see the actual negotiation between the DIMM and the controller. Sorry if you already said, but did you update the iDRAC/BIOS? There could be something else about the DIMM that is affecting the speed negotiation, like the timing or layout. It "appears" from what I can understand from the documentation as though your configuration "should" run at 1333MHz, so unless the docs are missing something or I missed something, it must be something about the DIMM's, and all other specs (speed, size, rank) seem to be in order.