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
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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)
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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
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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.
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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 !
Sorry for waking up any undead... but..
working towards getting this 16 core @4Ghz stable. im @ 3.95 stable for now. trick is less voltage, not more.. (maybe depends on motherboard, im using EPYCD8-2T)
testing on cp2077 and space marines two.. ill try cinabench at some point. and its not a golden chip. i have a batch of these from HPDL325 G10 and all get same clocks.. as i get high stable clocks i apply settings to other workstations with same chips.
working towards getting this 16 core @4Ghz stable. im @ 3.95 stable for now. trick is less voltage, not more.. (maybe depends on motherboard, im using EPYCD8-2T)
testing on cp2077 and space marines two.. ill try cinabench at some point. and its not a golden chip. i have a batch of these from HPDL325 G10 and all get same clocks.. as i get high stable clocks i apply settings to other workstations with same chips.
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Ok. Something quite odd is going on. I dont know if maybe someone can help me get in touch with Zen states dev or something.
I have stable 3.95Ghz on the 7351P on Asrock EPYCD8-2T as well as on HPe DL325 G10.
I use 1.356v for 3.95GHz and TDP goes anywhere between 215w o 250w depending on bench. Stable. I use CB, CPUz and some games to bench (GoW ragnarock, CP2077, Space Marines 2, Forza Horizon 5)
When I set it to 4Ghz. Normal tasks are fine but as soon as I try anything heavy, PC reboots. It just shoots up TDP to 300w+ even though its only a .05 increase in clock speed. Lowering or rasing voltages will give exact same result.
I set cTPD in bios at 285w and same thing happens. This is from a Stable 3.95Ghz. I'm so lost as to why TDP would shoot so high.
Anyone have an idea? My cooling is overkill. @3.95ghz my temps are 73c max (was lower days ago but I did a CPU swap and was too lazy to re apply fresh paste - I sometimes swap to a 64 core for work).
If we get across this, the 7351 could be a great 16 core performer at its dirt cheap price with simple OC
I have stable 3.95Ghz on the 7351P on Asrock EPYCD8-2T as well as on HPe DL325 G10.
I use 1.356v for 3.95GHz and TDP goes anywhere between 215w o 250w depending on bench. Stable. I use CB, CPUz and some games to bench (GoW ragnarock, CP2077, Space Marines 2, Forza Horizon 5)
When I set it to 4Ghz. Normal tasks are fine but as soon as I try anything heavy, PC reboots. It just shoots up TDP to 300w+ even though its only a .05 increase in clock speed. Lowering or rasing voltages will give exact same result.
I set cTPD in bios at 285w and same thing happens. This is from a Stable 3.95Ghz. I'm so lost as to why TDP would shoot so high.
Anyone have an idea? My cooling is overkill. @3.95ghz my temps are 73c max (was lower days ago but I did a CPU swap and was too lazy to re apply fresh paste - I sometimes swap to a 64 core for work).
If we get across this, the 7351 could be a great 16 core performer at its dirt cheap price with simple OC