Overclock your AMD Epyc

[Trotador]

Nice utility efschu2, I didn't know it.
It gives the same output than cpufreq so it has to be correct, also checked versus the processing done by the host which confirms it is at a lower clock than before applying zenstates. So, the higher power consumption was not becuase of higher clocks.

 

[Trotador]

One day with these settings, 100% all threads, no errors.

P0 - Enabled - FID = 9A - DID = B - VID = 62 - Ratio = 28.00 - vCore = 0.93750

 

[libranskeptic612]

I um... watercooled a 4p g34 es box and overclocked all 48c to 3.8ghz... I am drooling at the possibilities of rebuilding harbringer ....

So called because in competitive benchmarking you get to say "har, har, har".

 

[LobsterMD]

Finally got around to watercooling my workstation. AMD EPYC @ 3747.78 MHz - CPU-Z VALIDATOR

 

[AmusedGoose]

Finally got around to watercooling my workstation. AMD EPYC @ 3747.78 MHz - CPU-Z VALIDATOR

1.4V on that monster? Hot damn! Must have pulled North of 600 Watts?

 

[LobsterMD]

1.4V on that monster? Hot damn! Must have pulled North of 600 Watts?

My math adds up to about 490 - 510 watts.

 

[xdregox]

Be nice to have a on click script like in Linux for windows 10 to run dual cpus with zenstates all in windows startup anyone made one? rather than change processor affinity on Asus srv each time.

 

[AmusedGoose]

My math adds up to about 490 - 510 watts.

I'm getting around 400W on 3.4GHz / 1.1V on a 7401P...
33% more cores, 27% higher voltage = 677W, can't see how it would be under 600.

 

[LobsterMD]

I'm getting around 400W on 3.4GHz / 1.1V on a 7401P...
33% more cores, 27% higher voltage = 677W, can't see how it would be under 600.

Crazy, I'm just multiplying volts and amps. Since hwmonitor shows each package using like 10k watts.

 

[LobsterMD]

Does anyone know how to get the ryzen master software to work with an ES?

 

[tobermory]

Thank you for xdregox for highlighting the change of DID to 2, (and also to Nero and all the other contributors )


The following works on our system

python zenstates.py -p0 -f 21 -d 2 -v 4F --c6-disable

P0: Enabled - FID = 21 - DID = 2 - VID = 4F - Ratio = 33.00 - vCore = 1.05625


our 7281 seems stable at 3.3GHz with Vcore 1.06 (but only 12 hours so far)
We run with hyperthreading off
echo off > /sys/devices/system/cpu/smt/control

This is 100% load on all 16 cores
lm-senors reports core temp as 38C with the room AC on, and 42C with the room AC off. In our Gigabyte R181-Z90 - MZ91-FS01U case there are 8 fans blowing over the VRMs ( the fans aren't screaming so maybe the VRMS aren't hot -we don't know how to measure them) , and we have a Noctua 14S sticking out the top of the case.

I guess it could go a bit higher ?

 

[Trotador]

Use Supermicro SuperDoctor to monitor temps, voltages, fans. Check out those cpuvrms temps. With that voltage can get rather hot.

 

[tobermory]

thanks Trotador, we will try that

 

[tobermory]

just in case its useful to others:

We checked the VRM temp via the IPMI/BMC on a Gigabyte R181-Z90 - MZ91-FS01U
The VRM temp it was 30 to 35 C at full load.

We have overclocked this 7281 CPU to 4Ghz with 1.3V


python zenstates.py -p0 -f 28 -d 2 -v 28 --c6-disable

Current P0: Enabled - FID = 69 - DID = A - VID = 5E - Ratio = 21.00 - vCore = 0.96250
Setting FID to 28
Setting DID to 2
Setting VID to 28
Locking TSC frequency
New P0: Enabled - FID = 28 - DID = 2 - VID = 28 - Ratio = 40.00 - vCore = 1.30000




It has been stable for about two weeks with CPU temps always < 45 C and VRM always <40 and the case fans are always running at less than 50%

 

[Hydrogen_Bombaklot]

Wow, great thread.

Can someone advise what kind of performance I could expect out of dual 7551's on a Supermicro H11DSi-NT with Noctua NH U9's (250W TDP) cooling them? Would be running 128GB DDR4 2666 ECC per node (8x8GB per socket), and would be running 24x7 so stability is key.

 

[efschu2]

I'd like to see how high you can go with an EPYC 7002. Anyone plans to get one and test how high it can go?

 

[MLyons]

So I've got access to 2 Epyc 7742 chips and I'm trying to run the modified ZenStates but I'm getting an unsupported CPU error. Any ideas on a way to fix?

 

[Hydrogen_Bombaklot]

So I've got access to 2 Epyc 7742 chips and I'm trying to run the modified ZenStates but I'm getting an unsupported CPU error. Any ideas on a way to fix?

I have no idea but I'd also love to know if the Rome chips can be OC'd.

 

[MrCake117]

So I've got access to 2 Epyc 7742 chips and I'm trying to run the modified ZenStates but I'm getting an unsupported CPU error. Any ideas on a way to fix?

Have you tried the Linux version ?

 

[MLyons]

Have you tried the Linux version ?

I'm trying to do it to run cinebench. Purely for fun. not a long term clock speed