Overclock your AMD Epyc

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

  1. alex_stief

    alex_stief Active Member

    Joined:
    May 31, 2016
    Messages:
    415
    Likes Received:
    104
    Using thermal paste instead of thermal pads is not necessarily better for VRM cooling. The issue here is that the components are not all at the exact same height, in contrast to e.g. the relatively flat surface of a CPU heatspreader. A thermal pad helps to even out the tolerances, making good contact with all the parts.

    I am still curious about which parts of the VRM are actually cooled by the stock heatsink. On your picture it looks like the MOSFETs get no cooling at all. That might be worth looking into.

    As for the super doctor software: not sure If I get the problem. I can just go here and enter some valid sounding credentials.
     
    #161
  2. BryanH

    BryanH New Member

    Joined:
    Oct 28, 2019
    Messages:
    9
    Likes Received:
    0
    So you think maybe the high temps in super doctor could refer to the MOSFETs rather than the chip itself? I wonder if the improvements were from the fan on the heat sink blowing on the MOSFETs. That would actually be a good thing because those wouldn't be too difficult to sink. Interesting... Thanks, more testing forthcoming.
     
    #162
  3. ari2asem

    ari2asem Member

    Joined:
    Dec 26, 2018
    Messages:
    209
    Likes Received:
    17
    #163
  4. alex_stief

    alex_stief Active Member

    Joined:
    May 31, 2016
    Messages:
    415
    Likes Received:
    104
    I still don't get why you would need to download SD from a dodgy site, but maybe that's just me.

    Anyway, back to the VRMs: I only have second-hand knowledge here, but what I gathered over the years: those bulky components that the stock cooler seems to make contact with are the chokes. These are usually not the problem with overheating VRMs. On many motherboards that have heatsinks oon the VRMs, these components remain without additional cooling. It is the MOSFETS (the smaller components in between) that need to be cooled. A classic example with AMDs AM3 platform:
     
    #164
  5. BryanH

    BryanH New Member

    Joined:
    Oct 28, 2019
    Messages:
    9
    Likes Received:
    0
    After everything I have seen, I am convinced you are correct about this. I went ahead and ordered the MOSFET heat sinks and opted for the thermal glue instead of the tape that comes with them. These will not fit with the current VRM heatsink that comes with the motherboard, but they will fit with the water block I ordered.
    Thanks again, I will post temps and speeds in a few days after these are all installed.
     
    #165
  6. alex_stief

    alex_stief Active Member

    Joined:
    May 31, 2016
    Messages:
    415
    Likes Received:
    104
    I'm an idiot. Of course the heatsink makes contact with the MOSFETs. I messed up the scale of both photos in my head.
    Sorry for the confusion.
     
    #166
  7. BryanH

    BryanH New Member

    Joined:
    Oct 28, 2019
    Messages:
    9
    Likes Received:
    0
    I understood what you meant, it makes contact with the FET not the choke but the logic is still sound. They both should be cooled.
    VRMs.jpg
     
    #167
  8. MrCake117

    MrCake117 New Member

    Joined:
    Feb 28, 2019
    Messages:
    20
    Likes Received:
    13
    I asked Hybridcooling if it was possible to build a custom monoblock for my H11dsi 3 month ago, they just finalized it and they will send it to me in the next few days

    Monoblock HCM PRO MBD-H11DSI-NT-B

    monoblock-hcm-pro-mbd-h11dsi-nt-b.jpg
     
    #168
  9. charliehorse55

    charliehorse55 New Member

    Joined:
    Oct 3, 2019
    Messages:
    9
    Likes Received:
    1
    Damn, that's much cheaper (and simpler!) than buying two VRM and two CPU blocks
     
    #169
  10. alex_stief

    alex_stief Active Member

    Joined:
    May 31, 2016
    Messages:
    415
    Likes Received:
    104
    Holy cow, is that a monoblock for both CPUs and the VRMs? I have been pondering a water cooling option for quite some time now, this might convince me to finally do it.
     
    #170
  11. nero243

    nero243 Member

    Joined:
    Oct 28, 2018
    Messages:
    91
    Likes Received:
    62
    What are the CPUIDs for Rome retail and ES? Was just wondering if there's a possibility to get one of those 150$ Rome ES working on a H11 rev.1 Board. So i'll have to compare the microcodes and AGESA versions from the H12 series with the H11 ones.



    Are there any news regarding the AMD CBS Bios menu? I was living under a rock for the last few month.

    I kinda gave up my epyc platform, the horsepower for video editing in davinci resolve is insane, but i barely need it anymore.

    If anyone is interested in my H11SSLi VRM waterblock or the USB005 Dongle let me know, i'll probably put it up for sale soon.

    Edit:
    So i did a quick check the CBS Menu is still present in the Supermicro H12 bios. So if anyone feels like picking up working on this again, it's still worth a shot.
     
    #171
    Last edited: Nov 3, 2019
  12. charliehorse55

    charliehorse55 New Member

    Joined:
    Oct 3, 2019
    Messages:
    9
    Likes Received:
    1
    The $150 rome ES chips on ebay have serious physical damage, you can see the missing capacitor networks, pad damage and even scratches that might be deep enough to cut traces in the pcb!
     
    #172
  13. nero243

    nero243 Member

    Joined:
    Oct 28, 2018
    Messages:
    91
    Likes Received:
    62
    Most of them look savable. But yeah, it's kind of inconvenient when you have to work against hardware damage and firmware incompatability at the same time.
     
    #173
  14. charliehorse55

    charliehorse55 New Member

    Joined:
    Oct 3, 2019
    Messages:
    9
    Likes Received:
    1
    It'd be really interesting to investigate the overclocking headroom as well. With those chips set for 2 GHz turbo vs. 3.5+ for the production version. I wonder how many clock improvements they actually find between these ES chips and the final design.
     
    #174
  15. nero243

    nero243 Member

    Joined:
    Oct 28, 2018
    Messages:
    91
    Likes Received:
    62
    I actually don't think there's alot to be gained from a 64 core Rome CPU with the VRM you get on Supermicro boards. While the VRM can theoretically deliver enough power, the vdroop is just insane. You'd have to set your voltage to 1.4v (which has to be applied in idle) to get 1.2V under load. And a jumping voltage like this is not really a recipe for a stable system.
     
    #175
  16. epycforlife

    epycforlife New Member

    Joined:
    Sep 21, 2019
    Messages:
    3
    Likes Received:
    0
    Has anyone been able to OC a Rome cpu yet?
     
    #176
  17. diogin

    diogin New Member

    Joined:
    Mar 28, 2018
    Messages:
    21
    Likes Received:
    1
    Bios on Intel consumer motherboards often provide a setting called load-line calibration to prevent vdroop, does this setting exist (but hidden) on Epyc motherboards?
     
    #177
  18. nero243

    nero243 Member

    Joined:
    Oct 28, 2018
    Messages:
    91
    Likes Received:
    62
    I don't think so. There is no MSR documentation and no one seems to have unlocked the CBS menu yet. Maybe we'll have to wait for the new threadrippers, hope that these use the same MSR and some insider makes a tool for it. Maybe someone can monitor the MSR with RW-everything on a ryzen 3000 platform while ocing with the ryzenmaster software. I think the MSR has changed for the new generation Zen because they introduced the CCX overclocking options, which is substantially diffrent from Zen and Zen+.


    No, there are no LLC options in the bios and i don't remember to have found them in the IR controller software.
     
    #178
    epycforlife and RageBone like this.
  19. RageBone

    RageBone Active Member

    Joined:
    Jul 11, 2017
    Messages:
    263
    Likes Received:
    67
    Yea, the IR Software is messy and gives you different options depending on the controller.

    But there is at least a tool to do basic loadline calculation and I assume that there is also a setting inside.
    I'm not sure thoughe, if there is a PMBus command related to loadline.
     
    #179
  20. Quade

    Quade New Member

    Joined:
    Nov 13, 2019
    Messages:
    6
    Likes Received:
    0
    Holy cow, I just stumbled upon this thread, very interesting.
    There are SM boards up for grabs locally for like 400 bucks new bulk packaging, but finding a CPU is an absolute headache.

    Seeing this japanese dude has been putting batches of questionable SKUs for sale, compatibility is dodgy, and these might have been fried already by seeing it doesn't boot on their testing SM board.
    Sell As-Is! AMD EPYC 7551 ES 2S1451A4VIHE4 1.44GHz 32C Socket SP3 14nm | eBay
    Sell As-Is! AMD EPYC 7551 ES 2S1905A4VIHF4 1.9GHz 32C Socket SP3 | eBay

    I wonder has anybody tried their luck with those?
     
    #180
Similar Threads: Overclock Epyc
Forum Title Date
Processors and Motherboards EPYC Rome 7702 ES on ebay - bios mod + overclock? Oct 5, 2019
Processors and Motherboards der8auer overclocks EPYC 7601 with Supermicro H11SSL-i Jul 18, 2018
Processors and Motherboards Asus C621E Memory overclock Oct 15, 2019
Processors and Motherboards Overclocking "Bulldozer" Jul 1, 2018
Processors and Motherboards Xeon ES QK3M (E5-1650 v4) - Worth Overclocking? Mar 6, 2018

Share This Page