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Highlighted
Advocate

Memory configuration for a 192GB B200-M3

Customer  configured 12 x 16 GB Dimm configuration on a B200-M3

Server 3/4:
    Equipped Product Name: Cisco UCS B200 M3
    Equipped PID: UCSB-B200-M3
    Equipped VID: V01
    Equipped Serial (SN): FCH16277ZK7
    Slot Status: Equipped
    Acknowledged Product Name: Cisco UCS B200 M3
    Acknowledged PID: UCSB-B200-M3
    Acknowledged VID: V01
    Acknowledged Serial (SN): FCH16277ZK7
    Acknowledged Memory (MB): 196608
    Acknowledged Effective Memory (MB): 196608
    Acknowledged Cores: 16
    Acknowledged Adapters: 1

    Bios:
        Model: UCSB-B200-M3
        Revision: 0
        Serial:
        Vendor: Cisco Systems, Inc.

    Motherboard:
        Product Name: Cisco UCS B200 M3
        PID: UCSB-B200-M3
        VID: V01
        Vendor: Cisco Systems Inc
        Serial (SN): FCH16277ZK7
        HW Revision: 0

        Array 1:
            DIMM Location   Presence         Overall Status           Type         Capacity (MB) Clock
            ---- ---------- ---------------- ------------------------ ------------ ------------- -----
               1 A0         Equipped         Operable                 Ddr3         16384         1600
               2 A1         Equipped         Operable                 Ddr3         16384         1600
               3 A2         Missing          Removed                  Undisc       Unknown       Unknown
               4 B0         Equipped         Operable                 Ddr3         16384         1600
               5 B1         Equipped         Operable                 Ddr3         16384         1600
               6 B2         Missing          Removed                  Undisc       Unknown       Unknown
               7 C0         Equipped         Operable                 Ddr3         16384         1600
               8 C1         Missing          Removed                  Undisc       Unknown       Unknown
               9 C2         Missing          Removed                  Undisc       Unknown       Unknown
              10 D0         Equipped         Operable                 Ddr3         16384         1600
              11 D1         Missing          Removed                  Undisc       Unknown       Unknown
              12 D2         Missing          Removed                  Undisc       Unknown       Unknown
              13 E0         Equipped         Operable                 Ddr3         16384         1600
              14 E1         Equipped         Operable                 Ddr3         16384         1600
              15 E2         Missing          Removed                  Undisc       Unknown       Unknown
              16 F0         Equipped         Operable                 Ddr3         16384         1600
              17 F1         Equipped         Operable                 Ddr3         16384         1600
              18 F2         Missing          Removed                  Undisc       Unknown       Unknown
              19 G0         Equipped         Operable                 Ddr3         16384         1600
              20 G1         Missing          Removed                  Undisc       Unknown       Unknown
              21 G2         Missing          Removed                  Undisc       Unknown       Unknown
              22 H0         Equipped         Operable                 Ddr3         16384         1600
              23 H1         Missing          Removed                  Undisc       Unknown       Unknown
              24 H2         Missing          Removed                  Undisc       Unknown       Unknown

Is this compatible with Table 25 in the B200-M3 Specs ?? I don't thinks so ?

Thanks for any clarification

13 REPLIES 13
Highlighted
Collaborator

Memory configuration for a 192GB B200-M3

Walter,

If the customer was going to install 6 DIMMs per CPU (total of 12 in the blade) the arrangement had to be:

CPU1 = A0, B0, B1, D1, D0, C0    move A1 to D1

CPU2=  E0, F0, F1, H1, H0, G0    move E1 to H1

-Kenny

Highlighted
Advocate

Memory configuration for a 192GB B200-M3

Thanks Keny ! This confirms my understanding. This 192GB config should also clock at 1600 MHz (dimms and cpu support it) ?

Highlighted
Beginner

Re: Memory configuration for a 192GB B200-M3

Please see the detail for you query in the documnet attched ,Hope this may help you out  regarding your query.


Memory best practice guides.

Memory Configuration Best Practice for UCS M3 Servers-v1 03 (2)

           

Highlighted
Advocate

Re: Memory configuration for a 192GB B200-M3

I think this is a Cisco internal document ?

Can you please post it, and/or refer to public documents ! The situation becomes very confusing !

Thanks

Walter.

Highlighted
Beginner

Re: Memory configuration for a 192GB B200-M3

Yes Walter ,

This is Cisco Document ..for public Document I refer the below Spec sheet

http://www.cisco.com/en/US/prod/collateral/ps10265/ps10280/B200M3_SpecSheet.pdf

Highlighted
Cisco Employee

Re: Memory configuration for a 192GB B200-M3

Walter this is explained in the B200 M3 HW Install Guide:

http://www.cisco.com/en/US/docs/unified_computing/ucs/hw/blade-servers/B200M3.html#ID799

Table 3

For 12 DIMM Configurations (6 DIMMs per socket)

CPU0

A0, B0, C0, D0, A1, B1

CPU1

E0, F0, G0, H0, E1, F1

For above the memory would only run at balanced at 1333Mhz if you populate all 3 banks.   If you want to run the memory at 1600Mhz then you can only populate the first two banks as detailed in the thread above.

With 3 DIMMs populated per channel, 8 GB and 16 GB 1600-MHz memory devices run at a

maximum speed of 1333 MHz. Other memory devices are limited to 1066 MHz operation

when populated at 3 DPC

Robert

Highlighted
Advocate

Re: Memory configuration for a 192GB B200-M3

Hi Robert

There are simply contradicting facts:

http://www.cisco.com/en/US/docs/unified_computing/ucs/hw/blade-servers/B200M3.html#ID799

Table 3

For 12 DIMM Configurations (6 DIMMs per socket)

CPU0

A0, B0, C0, D0, A1, B1

CPU1

E0, F0, G0, H0, E1, F1

Hardware Spec

http://www.cisco.com/en/US/prod/collateral/ps10265/ps10280/B200M3_SpecSheet.pdf

Table 25, says

CPU0
A0,B0, B1, D1, D0, C0

CPU1
E0, F0, F1, H1, H0, G0

Something is wrong here ! and a similar documentation issue exists for the B22-M3 (see my other note)

Thanks for any clarification

Walter.

Highlighted
Collaborator

Re: Memory configuration for a 192GB B200-M3

Walter,

You are right on this one, there is a discrepancy.

On http://www.cisco.com/en/US/prod/collateral/ps10265/ps10280/B200M3_SpecSheet.pdf you may even see that for a 6/10 DIMMs per CPU config, the document only lists CPU2.

I will ask how we can give feedback on this, but it will "best effort" from my side...

-Kenny

Highlighted
Collaborator

Re: Memory configuration for a 192GB B200-M3

Walter,

If  you have not, please open a TAC case if you dont mind and ask for the  confirmation in regards to the correction/confirmation about the docs  discussed, it is complicated without the case number for me.   You may  open the case with the keyword "Product Questions and Features"

You can use this thread to open the case cause they will need a case number if a doc bug needs to be opened.

-Kenny

Highlighted
Beginner

Re: Memory configuration for a 192GB B200-M3

Hi All

There is a public link to the Memory Configuration Best Practice for UCS M3 Servers.

https://communities.cisco.com/docs/DOC-34924

Nabil

Beginner

Re: Memory configuration for a 192GB B200-M3

Highlighted
Advocate

Re: Memory configuration for a 192GB B200-M3

Hi Azhar

Of course I know this document, but......

There are simply contradicting facts:

http://www.cisco.com/en/US/docs/unified_computing/ucs/hw/blade-servers/B200M3.html#ID799

Table 3

For 12 DIMM Configurations (6 DIMMs per socket)

CPU0

A0, B0, C0, D0, A1, B1

CPU1

E0, F0, G0, H0, E1, F1

Hardware Spec

http://www.cisco.com/en/US/prod/collateral/ps10265/ps10280/B200M3_SpecSheet.pdf

Table 25, says

CPU0
A0,B0, B1, D1, D0, C0

CPU1
E0, F0, F1, H1, H0, G0

Cheers

Walter.

Highlighted
Cisco Employee

Re: Memory configuration for a 192GB B200-M3

Hi Walter,

I raised this up to our Product Marketing team and they are in the process now of pushing through the required corrections to the HW Spec Guide. To summarize: Table #3 (Above in this string) is correct and Table #25 in the HW Spec is being corrected. Thank you for bringing this to our attention.

Jeff Foster

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