• 7702 Dual CPU server only used one CPU

    I have an engineering team using a Dell server with windows on it for Thermal Desktop analysis. It is a dual CPU system with 128 cores. When they run any of their tests, the system will only use one socket and 64 core...
    kperkins
    last modified by kperkins
  • Specific EPYC 7702 CPUs from Penang factory don't work

    AMD EPYC 7702 64-Core CPUs with letter D on the bottom right of the heat spreader built at Penang factory do NOT work. Tested with 5 HPE servers of 2 different types, and a Supermicro server. Total ...
    memin1857
    last modified by memin1857
  • Epyc 7282 Memory bandwidth issues

    Hello,   We seem to be having a problem with memory bandwidth using 2 Epyc 7282 CPUs with 4 DIMMS of HMA82GR7CJR8 RAM 16GB DDR4-3200 2Rx8 ECC REG DIMM HYNIX memory per socket on a Supermicro H11DSi board. We tri...
    ksistof_bortkevic
    last modified by ksistof_bortkevic
  • 7302P sitting at 1.7GHz idle

    New HPE DL325 Geb10 out of the box yesterday.  I need the idle speed to sit closer to the base speed, I have edited the WIN 2019 control panel power profile and the power/processor settings in the BIOS based on t...
    jfrost
    last modified by jfrost
  • What is configurable TDP, and what values can I set for my EPYC processor?

    What is configurable TDP, and what values can I set for my EPYC processor?
    lesd
    last modified by lesd
  • New HPC Tuning Guide Posted on AMD Developer Central

    A new app note on tuning AMD EPYC platforms for HPC applications has been posted to AMD Developer Central. You can find it  under EPYC Resources > Performance Tuning Guides or by clicking directly on this link.
    jesse_amd
    last modified by jesse_amd
  • Questions about hardware and software support on SEV-ES

    Hi, everyone,    I have several questions on SEV-ES.   Does AMD EPYC 7281 support SEV-ES?        Is there any information about which specific EYPC CPU support SEV-ES?   ...
    jinyu
    last modified by jinyu
  • Supermicro Epyc 7401 PCI Bus Resource Problem

    We have a Supermicro dual socket Epyc 7401 2u server and see that BIOS assigns PCI Root Bus numbers of 0x00 0x10 0x20 0x30 0x40 0x50 0x60 and 0x70 for the 8 numa nodes.  Each of the nodes would therefore have a t...
    kchow
    last modified by kchow
  • SMI problem on AMD Epyc 7301

    Hello! I'm working with AMD Epyc 7301 (AMD64 Family 17h model 00h-0Fh) with QNX (real-time OS) and have SMI interruptions on all CPUs every 32 ms for ~400 us. But in Linux (SLES RT) i dont't see such behaviour a...
    f.popchenko
    last modified by f.popchenko
  • Epyc 7251 processors boot/post problems

    Wondering if anyone else has ran across this or can help,  First off I purchased 10 Dell R7425 servers that were shipped with 7251 processors, long story short Dell shipped me the correct 7551 processors to put ...
    mikepippin
    last modified by mikepippin
  • "Determinism slider" bios option vague description.

    Below is the definition of what this bios option does, however, it's still pretty vague. Does anyone have a better idea as to what would be the optimal setting for getting the most out of video rendering, gaming and j...
    xdemoncamberx
    last modified by xdemoncamberx
  • epyc 7551 spontaneously resets after 10mins rendering

    I just finished building a system, dual 7551 epyc cpus using the supermicro H11DSi-NT motherboard. The build went very well, and the system is running just fine, and the performance is extraordinary.   I am usi...
    goodguy
    last modified by goodguy
  • HPL Benchmarking

    Hi,   I am trying to run HPL on an AMD Epyc node (dual socket). I'm getting pretty low numbers so I wanted to see if anyone has had success getting 80-90% of theoretical peak with HPL, i.e. what compiler, MPI ve...
    ssawyer
    last modified by ssawyer
  • Where is AMD microcode hosted for Linux?

    amd64.org website appears to be down, where is CPU microcode available from? and where will the updates to it published?
    xnox
    last modified by xnox
  • Ability to Control Power Consumption?

    How do I control and limit the power consumption of the processor? 
    jesse_amd
    last modified by jesse_amd
  • New NUMA White Paper Posted on AMD Developer Central

    A white paper on the benefits of NUMA on AMD EPYC™ has been posted to AMD Developer Central. You can find it under EPYC Resources > White Papers or by clicking directly on this link.
    jesse_amd
    last modified by jesse_amd
  • EPYC 7351 + Supermicro H11-DSi soft reboot blank screen

    We have a few Supermicro H11-DSi server with Dual EPYC 7351 and 16 x 8GB DIMMs (Micron 2666).  After running full load (LQCD benchmark) for longer than 5 to 10 minutes, issuing reboot command in CentOS 7.4 will c...
    sho1sho1sho1
    last modified by sho1sho1sho1
  • Will boost frequency increase if I manually reduce the core count in BIOS?

    Will boost frequency increase if I manually reduce the core count in BIOS?
    lesd
    last modified by lesd
  • What is the difference between Power and Performance Determinism in the BIOS?

    I see a BIOS setting called Determinism and would like to know more what it means.
    bob.shaw
    last modified by bob.shaw
  • Why did I get different idle CPU frequency behaviors in RHEL and Windows Server 2016 with the same EPYC system and BIOS settings? RHEL always had fixed frequency.

    With the same system configuration and the same BIOS setting. (CPU: EPYC 7451) I would see CPU idle frequency was shown as 2.3GHz always in RHEL 7.4 and 1.2GHz in Windows server 2016.
    eddietsaitalk
    last modified by eddietsaitalk