Finally: Overclocking EPYC Rome ES

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bayleyw

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Jan 8, 2014
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FCLK on Threadripper is unlocked, but realistically tops out at 1800MHz just like all the other Ryzens.
 

Gordan

Member
Nov 18, 2019
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Right, so optimistically:
Epyc: 8x 2933 = 23,464
Threadripper: 4x 3600 = 14,400

So about 39% slower, assuming 1800 / 3600 is stably achievable.
 

ari2asem

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Dec 26, 2018
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i am sorry to tell this, but all this memory and IF talk doesn't belong in this thread.

this thread is overclocking cpu, not fine tuning your memory with cpu....3 pages of offtopic talk....keep the topic clean, please..


why don't you start new thread for this discussion ??

@ExecutableFix please, ask them to stop talking offtopic about memory and IF. your thread is going totally wrong direction
 
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Gordan

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Nov 18, 2019
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@ari2asem I would argue it is more meaningful content than discussing how the tiny supply of low-clocked engineering sample CPUs only available technically illegally can be overclocked. It's not like we have a way of doing anything at all with the abundantly available retail CPUs at this time.
 

ari2asem

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Dec 26, 2018
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indeed it is meaningfull discussion or content. but do it in another thread, not here.
make a special thread for this meaningfull info.


i thougth that this thread was about using cpu overclock program. not about fine tuning your system to the best performance
 

Epyc

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May 1, 2020
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Are you saying that infinity fabric on trx is not limited to 1467MHz?
Or do you mean that I'd partly mitigate losing 50% of the memory channels by gaining 30% more memory clock speed?

I am eyeing the recently announced 7F72, but they still seem to be unavailable for purchase, and the price is double compared to a 7402P which makes it really poor value.
It is not, trx40 can do around 1800 if fabric max with some people making it go to 19xx
But realistic you compensate the if 2:1 with performance at around 4000-4400mhz. That's not completely insane speeds. 4000 can be found somewhat affordable.
 

Layla

Game Engine Developer
Jun 21, 2016
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i am sorry to tell this, but all this memory and IF talk doesn't belong in this thread.

this thread is overclocking cpu, not fine tuning your memory with cpu....3 pages of offtopic talk....keep the topic clean, please..


why don't you start new thread for this discussion ??

@ExecutableFix please, ask them to stop talking offtopic about memory and IF. your thread is going totally wrong direction
How is clock rate of IF (PART OF THE CPU) not relevant to overclocking the CPU? It's relevant to performance and stability when overclocking.
 

bayleyw

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Jan 8, 2014
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The IF talk is particularly relevant since we're pretty sure it can be fixed with the right tweaks, according to @Epyc it seems possible to stabilize the system at higher IF speeds with more volts.
I'd give it a try on my ZS1406 but the BIOS I'm using doesn't expose those features.
 
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ari2asem

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How is clock rate of IF (PART OF THE CPU) not relevant to overclocking the CPU? It's relevant to performance and stability when overclocking.
getting your system stable is not the point of the OP. neither getting the best performance with tuning IF.

the OP was about using overclock program.

i am not saying that all this discussion isn't important. i only say it belongs in another thread.

once again...please, make a new OP with all your stability and performance discussion
 

efschu3

Active Member
Mar 11, 2019
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Well, the IF clocks are part of the CPU and does belong directly to Zen(+/2) overclocking, so it should be part of this thread and not of a second (to have all relevant info in one thread).
As long as the TO does not say different - whats the problem?
 
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MrCake117

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Feb 28, 2019
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Someone found a way to boot ES cpu on latest bios for the h11dsi ? I know that it's possible to boot on latest bios version on other sm board by downgrading agesa ,I've tried here dowgrading agesa and NBIO pei related driver but without success...

Also is it possible to lower P1_SOCRUN ? Mine are running freaking hot and hard to cool.
 

bayleyw

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Jan 8, 2014
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To briefly go back to what I posted yesterday, here are some 7-Zip scores:

7z.png

7-Zip is a finicky benchmark: a single W-3175X beats two Platinum 8280's, and the 3990X is beaten by the 3970X. The benchmark also doesn't scale past 64 threads very well, and is honestly not that useful, because you'll end up I/O limited much of the time. My point here is the ES is slower than the 3990X, but not horrifyingly so: it's about 25% slower in the combined benchmark, and the latency-sensitive compression score is lower but not terrible.

The 2990WX, on the other hand, exhibited what I would consider anomalous behavior in the compression benchmark, showing worse performance than a stock 8700K despite having five times the cores. You could argue that's because Windows sucks (I think there were even patches that lifted performance), or because 7-Zip has problems, but if you were compressing files with 7-Zip on Windows that's what you got, and you would have been somewhat disappointed to say the least.

I'd be really interested to run some database or data-mining benchmarks, but it's a bit tricky because I'm on Windows; anyone know of any good ones?
 
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Gordan

Member
Nov 18, 2019
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That's pretty good going for a 32c/64t CPU. This is what I get:

# 7za b

7-Zip (a) [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=en_GB.UTF-8,Utf16=on,HugeFiles=on,64 bits,48 CPUs AMD EPYC 7402P 24-Core Processor (830F10),ASM,AES-NI)

AMD EPYC 7402P 24-Core Processor (830F10)
CPU Freq: - - - - - - - - -

RAM size: 257773 MB, # CPU hardware threads: 48
RAM usage: 10590 MB, # Benchmark threads: 48

Compressing | Decompressing
Dict Speed Usage R/U Rating | Speed Usage R/U Rating
KiB/s % MIPS MIPS | KiB/s % MIPS MIPS

22: 100710 2894 3386 97971 | 1347549 3731 3080 114915
23: 101842 3222 3221 103765 | 1365120 3840 3076 118121
24: 94792 3118 3269 101921 | 1234291 3557 3046 108337
25: 82703 2923 3231 94427 | 1212190 3557 3033 107873
---------------------------------- | ------------------------------
Avr: 3039 3277 99521 | 3671 3059 112311
Tot: 3355 3168 105916
 

bayleyw

Active Member
Jan 8, 2014
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That's pretty good going for a 32c/64t CPU. This is what I get:

# 7za b

7-Zip (a) [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (locale=en_GB.UTF-8,Utf16=on,HugeFiles=on,64 bits,48 CPUs AMD EPYC 7402P 24-Core Processor (830F10),ASM,AES-NI)

AMD EPYC 7402P 24-Core Processor (830F10)
CPU Freq: - - - - - - - - -

RAM size: 257773 MB, # CPU hardware threads: 48
RAM usage: 10590 MB, # Benchmark threads: 48

Compressing | Decompressing
Dict Speed Usage R/U Rating | Speed Usage R/U Rating
KiB/s % MIPS MIPS | KiB/s % MIPS MIPS

22: 100710 2894 3386 97971 | 1347549 3731 3080 114915
23: 101842 3222 3221 103765 | 1365120 3840 3076 118121
24: 94792 3118 3269 101921 | 1234291 3557 3046 108337
25: 82703 2923 3231 94427 | 1212190 3557 3033 107873
---------------------------------- | ------------------------------
Avr: 3039 3277 99521 | 3671 3059 112311
Tot: 3355 3168 105916
That's actually a 64/128, but 7-Zip doesn't fully utilize it. The comparison with the 24-core retail part is interesting, we get 2x the decompression performance going from 24 to 64 cores which is not bad at all since the 7402P is a higher clocked part. The decompression doesn't scale as well, which is...expected. Are you on Windows or Linux?
 

Gordan

Member
Nov 18, 2019
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The above measurement was on Linux, and the machine isn't entirely idle, it's spending 10-20% of CPU on other things running on it.
 

hrvoje.sedlic

New Member
Dec 23, 2019
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I`m actually trying to understand why we have very unstable rendering in Corona renderer with dual 7742 QS. It got alot better with 2.1 bios but it`s not there yet.