Overclock your AMD Epyc

Discussion in 'Processors and Motherboards' started by nero243, Feb 5, 2019.

  1. NORM123

    NORM123 New Member

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    I will try latter, thx
     
    #201
  2. NORM123

    NORM123 New Member

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    I change the system to the servers2016, and try3.4ghz in r20 take 8000, but I get 30000 in CPUz, it's strange, I think 30000 score is normal situation for this CPU. could test what epyc 7551 score in cpuz thx
     
    #202
  3. MrCake117

    MrCake117 New Member

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    That what i get with 2 7551 ES clocked at 3.4ghz and 1 dimm per ccx
    I was running 1 dimm per die before and the score almost the same for this workload.
    You should really consider running 1 dimm per die (at least 4 dimm per socket)


    [​IMG]

    [EDIT]

    I was running 14dimm out of 16
     
    #203
    Last edited: Nov 19, 2019
  4. NORM123

    NORM123 New Member

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    sorry the picture is low quality i cant read it. So i need more dimm for my motherboard which can get same score? i am thinking to buy more 32GB ECC RAM for 4 dimm per socket
     
    #204
  5. MrCake117

    MrCake117 New Member

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    I edited my previous post so you should be able to check the picture in full res

    Yes you should at least run 4 dimm per socket

    Here is some bench with mixed workload on a 16 core epyc ,on a 32 one it will be even worst

    https://www.servethehome.com/amd-epyc-naples-memory-population-performance-impact-at-16-cores/
     
    #205
  6. NORM123

    NORM123 New Member

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    #206
  7. Quade

    Quade New Member

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    @NORM123 Quad/Octa channel will yield the most gains, single channel is always bad regardless of the platform (looking at you, laptops).
     
    #207
  8. NORM123

    NORM123 New Member

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    ok, but now I am think should I but new 8gb ram for 4dimm, since 4*32gb I have no need for that
     
    #208
  9. alex_stief

    alex_stief Active Member

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    It's a Zen1 architecture with complicated NUMA topology, and with no workstation-class motherboards available. Not ideal for general-purpose workstations, regardless of clock speed ;)
     
    #209
  10. nero243

    nero243 Active Member

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    It's weird that this new bios even works with the ES.

    Also i just remembered there was a problem with zenstates and dual CPU systems, did you check if the clock applies to both CPUs?

    This is the procedure you have to follow, if the clock is only applying to 1 CPU
     
    #210
  11. NORM123

    NORM123 New Member

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    thx , i find the reason which is each CPU need 4 dimm.
     
    #211
  12. NORM123

    NORM123 New Member

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    other problem is the vrm, I use the dual 40*40*10mm fan to cooling vrm, but it still will over 100°c 3.5@1.2v . it happens when I render with c4d or stress tests fpu. now I adjust the CPU 3.0@1.14v. The highest temperature 90°c ( vrm). could you share how do you cooling the vrm?
     
    #212
  13. nero243

    nero243 Active Member

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    You have to DIY something, i don't think aftermarket VRM Heatsinks for these boards exist.
     
    #213
  14. nero243

    nero243 Active Member

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    Update on the Bios Mod:

    After bricking MrCakes system multiple times i managed to unlock the complete AMD CBS Menu on a Supermicro H11DSi-NT.

    Bad News, not everything seems to work... The Custom Core P-States don't seem to do anything for example. Memory OC seems to work a bit.

    Are there any willing testsubjects here with different mainboards? (The recovery was always possible via IPMI for MrCake)

    [​IMG]
     
    #214
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  15. MrCake117

    MrCake117 New Member

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    #215
    Last edited: Nov 23, 2019
    nero243 likes this.
  16. alex_stief

    alex_stief Active Member

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    I've got the H11DSi (not the NT), so not exactly a different board.
    This sounds pretty amazing, any chance you could do a write-up of the process, so dummies like me can follow it?
     
    #216
  17. nero243

    nero243 Active Member

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    But you're using retail CPUs and a newer Bios version than 1.0c, right?

    I'll write up the process, but first I need to do some cleaning up and remove unnecessary steps.
     
    #217
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  18. alex_stief

    alex_stief Active Member

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    Yes, retail 7551 and bios version 1.3.
     
    #218
  19. nero243

    nero243 Active Member

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    So if anyone wants to DIY this mod heres what you need for SuperMicro boards:

    UEFITool
    https://puissanceled.com/vrac/Bios_modding/softs/UEFITool.exe
    IFR Extractor
    https://puissanceled.com/vrac/Bios_modding/softs/Universal_IFR_Extractor.exe
    HexEdit:
    I'm using FlexHex for comparison etc and SiSoft Hex-Editor for quick changes
    AMIBCP 5.02.0031
    Search it, i won't link because AMI often gets mad.
    NotePad++
    standard editor works too, but the formatting is shit

    This is only for Supermicro Boards. for different Boards with fully locked CBS you have to find another Option like Eventlog you can give up. Boards with partially unlocked CBS should only need the BCP edit and maybe a IFR edit of the CBS menu.
    1.
    Open your rom in UEFITool, use text search and find the following things AMITSE CbsSetupDXE EventLogSetupPage
    2.

    Extract the PE32 image Section from each one as-is.
    3.
    Run CbsSetupDXE and EventLogSetupPage through the IFRexctractor and open the .txt's in NotePad++
    4.
    Note down the first marked string from Form Set and add the part from Form, do this for both IFR Files (cbs and event).

    CBS is almost always:
    Code:
    E3 35 45 B0 04 30 46 49 9E B7 14 94 28 98 30 53 (00 70)
    strings.png
    5.
    Open AMITSE in HexEdit search the String from EventLogPage, and replace it with the CBS string. Save.
    6.
    Go back to UEFITool and Replace AS-IS the AMITSE module with the modded one. Save the ROM.
    7.
    Open the ROM in AMIBCP and spend the next 30 minutes setting every single CBS Entry from default to User. Save again.
    8.
    Flash.

    If submenus are still missing you have to do an IFR Edit.
    Explained here if it's a simple lock (switching 46 02 to 47 02):
    Modding the Asus Prime X370 Pro BIOS

    If you don't have the 46 02 lock:


    Downloads H11DSi(-NT same bios):
    V1.3, (not IFR edited, should work anyway) untested:
    Amitsemodbcp1.3
    V1.0C (IFR Edited, probabaly unnecessary) tested has some cosmetic issues:
    DIDpatchmin1


    Both of them have also a patch in the CBS P-states to select a DID lower than 8, but this didn't make the P-states work.

    Edit:
    Added to start post, please check there for the latest versions.
     
    #219
    Last edited: Nov 30, 2019
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  20. Trotador

    Trotador New Member

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    #220
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