Any chance you can steer me to the right way to OC with the same setup? I have an H11DSI with the most recent 2.7 bios version and 2 7551 retail chips. System runs fine as is. With SMT disabled my all core freq is 2.4ghz at 100% utilization and I would love to reach over 3 as the norm without ruining my system reliability.
Overclock your AMD Epyc
- Thread starter nero243
- Start date
Notice: Page may contain affiliate links for which we may earn a small commission through services like Amazon Affiliates or Skimlinks.
Sent you a Pm with discord
However after asking I finally found the right link to the download to the modded zenstates that works for me. The last one I tried didn't wanna work with my mobo.
Currently have it at 32.5x on 1.063v. Much higher on speed and the temp climbs. I'm air cooled on 6 heat pipe 4u coolers. My first try I went too big and tried 3.4ghz on 1.25 volts and within a minute the overheat alarm was going off so I added an old 4 pin CPU cooler fan kinda perched on the tower cooler and leaned against the ram to blow air down on and across the vrm cooler at an angle.. So far so good at this clock and voltage I'm steady at 62c... If I dial it back just a touch the fans quiet down significantly. But has raised my hash rate from around 31,500 to 40,500+ as my newest average.
If I up my cooling I'm sure I can go higher but this was a BUDGET build. the whole system mobo, ram, CPUs, coolers, and m.2 SSD but not including case and power supply was $1,135 (not including state sales tax)
Last edited:
Ok cooling is a very important factor. IM running the revised version of the enermax tr4 II cooler. my only limitation is wattage. I managed to get my CPU at 4GHz but depending on the app or benchmark it would cut off system at the wattage limit mark on the EPYCD8-2T board and also on the HP DL325. even when i get a bench to complete my scores are lower than some other benches i have at lower clocks. So ultimately i settled for lowest possible voltage with good score and kept it there.
Not hot but I don't want to crank on it until the verge of overheating. I dialed it back to 33x and 1.113v
This is my current system temp after a few days of continuous working... I am ducting in cold air from outside to the front filtered case intake so I'm cheating a little bit but I'm air cooled. I wish there were more practical water blocks for this socket. If ever there was a time to put a much bigger rad outside this is it
Large temp difference between CPUs is due to the first one getting the much colder outside air first as they're both blowing the same direction because of the case flow direction in at front and out at back and top. Maybe I can find a couple used or leaking tr4s and pillage the waterblocks for a custom loop at some point
Attachments
Last edited:
You will find it hard to justify a custom loop when u see how well the enermax tr4 performs. Matter of fact it was the go to aio for the new Intel Xeon Ws which use much more TDP than our EPYC chips. Either that cooler or or liquid nitrogen. I got mine for 65usd. Prices dropped.
I will have to check eBay. I noticed a couple on there under $60 used. I have some misc hardware like pump and res etc floating around but yeah if they're that good I can probably just get 2 of the 360mm ones and run them as is . My case has mounting for 2 360mms on the side cover already
I really appreciate your input
Main reason I'd love a custom loop is to add liquid vrm cooling as well. My cpus stay upper 60s while vrms are low 80. Will see what pops up when the time comes.
If I try to bump up the power higher i black screen pretty much immediately so I think I'm maxing out my 850w power supply between the 2 CPUs and the gpu even though the GPU isn't really doing anything but giving me a home page display. So I definitely don't need to go crazy for basically no gain. Maybe I can just grab a 120-240mm rad and an old pump and slap together a vrm cooling loop because there just isn't a good spot to move my vrm fan any closer because of the coolers taking up so much real estate.
Also, do you know of any program that gets an accurate power draw reading? I usually use coretemp but on this system it starts off believable.. high 200s, creeps to about 305w a socket then defaults to 999w a socket after a sec which obviously isn't right
It's a bug that was never fixed when u pass certain TDP. Can't recall what the max is but I'll try when I get home. I think it's 350w or 400. Maybe 300. Ever since i set it to 3.8 and under locked i never hit the TDP wall. I use hwinfo64 and when it passes a certain TDP I get like millions of watts usage.
Last edited:
what does amd epyc 7551 not overclock on supermicro h11dsi rev 2.0?Hello!
I've updated the ZenStates app with Rome CPUID, however I haven't figured out the P-States (or manual overclock) yet.
There is no BKDG for family 17h and setting the well-known P-State MSRs doesn't change the CPU frequency. I have no access to NDA stuff.
If I set the P-State, then read it back it shows the newly set multiplier, but the actual frequency is still the old one. Same with the Linux script.
So I'm currently scratching my head over this.
It would help if you report that at least it detects the CPU correctly.
Performance Bias options "might" work, perhaps some of the others, but not P-State
I'm not even sure if the MSR are shared between Matisse and Rome.
Hopefully it won't "break" your system, but apparently I have no way to test.
EPYC1 shared the CPUID with desktop parts, but now Rome has a new CPUID.
Download zip from my github releases page: irusanov/ZenStates
Changelog:
- Added Rome support (P-States won't work, but at least it should start without complaining about unsupported CPU)
- Added support for 32-bit OS (tested on XP SP3 x86)
- Reduced .NET Framework version to 4.0 (lowest I can go for the current codebase)
Update 21 Aug:
I have managed to change the frequency with commands to SMU. Unfortunately there's no public document describing all commands. I've updated the readme with what I've been able to find so far mostly by trial and error method. Should be able to provide at least manual overclock soon.
irusanov/ZenStates
Attachments
sure. you can get up to max. the CPU supports ( 2666/2933/3200 ) until you get RAM errors.
but not recommended.
ask yourself: if 2133 RAM can work @2666 without any issues for 10 years ( warranty period )
the manufacturer would sell it as 2666 and make much more profit !
Is it possible to overclock "RAM" on amd epyc 7551 + supermicro h11dsi rev 2.0?