09-26-2010 03:55 PM - edited 03-01-2019 09:43 AM
Part of Intel's revision from the 5500 to 5600 series processor was support for maintaining memory speed at 1333 MHz (for the processors that support it) with two DIMMs per channel. Will a B200 M2 with x56xx processors run memory at 1333 MHz with two DIMMs per channel?
thanks
Jeff
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09-27-2010 12:43 PM
The above answer is Incorrect. You CAN populate (2) DIMMs per Channel on the B200 M2 and the memory will clock at 1333Mhz (assuming you are using 1333 Mhz rated DIMMs - 8GB DIMMs or smaller). This results in up to 96GB clocked at 1333 Mhz.
Cheers,
Brad
09-26-2010 09:34 PM
No, if you populate the second dimm in any channel it will drop the speed to 1066mhz. You do have 3 channels per socket, so up to the first 6 dimms will run at 1333.
09-27-2010 07:26 AM
Wasn't that the point of the 56xx series? Even Intel states 1333 support with 2 DIMMs per channel. I quick search shows that Dell, IBM, HP, etc. support this configuration in their product. My assumption was that Cisco would too, and the documentation was just incorrect.
09-27-2010 08:31 AM
It was actually possible even on the 5500 series. HP had a bios update that let you do it almost a year ago.
I don't know why Cisco hasn't followed suit.
09-27-2010 12:43 PM
The above answer is Incorrect. You CAN populate (2) DIMMs per Channel on the B200 M2 and the memory will clock at 1333Mhz (assuming you are using 1333 Mhz rated DIMMs - 8GB DIMMs or smaller). This results in up to 96GB clocked at 1333 Mhz.
Cheers,
Brad
09-27-2010 12:47 PM
Excellent. Then please update the documentation:
http://www.cisco.com/en/US/docs/unified_computing/ucs/hw/chassis/install/blade.html#wp1035155
This still says what I stated above. It has information for both M1 and M2 blades and doesn't say there were any changes for the 5600.
09-27-2010 12:59 PM
Harold,
I have sent a message to engineering to update this documentation. Thanks for pointing this out.
Cheers,
Brad
09-27-2010 01:41 PM
brhedlun wrote:
The above answer is Incorrect. You CAN populate (2) DIMMs per Channel on the B200 M2 and the memory will clock at 1333Mhz (assuming you are using 1333 Mhz rated DIMMs - 8GB DIMMs or smaller). This results in up to 96GB clocked at 1333 Mhz.
Cheers,
Brad
Thanks Brad, I suspected it was possible. Thank you for confirming it and asking that the documentation be updated.
Jeff
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