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Topic: AMD Ryzen 9 🖥️ 3900x RandomX mining benchmarks - page 4. (Read 2228 times)

member
Activity: 388
Merit: 13
Nopes, it isn't.

Reboots after a couple hours mining monero.

Let's try a bit more voltage.
member
Activity: 388
Merit: 13
Wow. Thanks a lot.

I did it and now RandomX benchmark hits 13300 H/s. Me happy.  Grin

Now let's see if it's stable 24/7.
member
Activity: 116
Merit: 66
tRFC=631 is very very bad timing. tRFC is crucial for high hashrate, most good results I've seen use tRFC=300 or less. Just use Ryzen DRAM calculator with fast preset to get better timings and set _all_ timings it shows you.
member
Activity: 388
Merit: 13
I used a tighter timings profile in the bios (MSI X570-A Pro) and result is the same.

~11k, 24 threads.

Timings are:
Dram frequency 1800 Mhz
FSB:DRAM 5:54
CL 14
tRCD 16
tRP 16
tRAS 36
tRC 84
tRFC 631
CR 1T

DIMM voltage is 1,472

I though DDR4-3600 @ 14-16-16-36 timings was pretty fast RAM, but apparently I'm wrong.
copper member
Activity: 406
Merit: 59
I set my Corsair Vengeance to 3633 Mhz @ 16-17-17-34-50 timings.

Not great performance, though. 11000 H/s.

What am I doing wrong?

What are the voltages?
Not sure about your timimngs
copper member
Activity: 406
Merit: 59
Watercool your 3900x.

I went from 85ºc with stock cooler with lots of fans and open case to ~64ºc with watercooling, plus + 166 Mhz boost for free. No overclocking.

I wouldn't be confortable runnig a CPU @ 85ºc 24/7. It will fail, sooner or later.

Seems like a option, i wont be running it over 80c in any case. I rather then reduce the clock peed and voltages.
legendary
Activity: 2026
Merit: 1005
And why would you run your RAM @ CL 26?  Huh
that`s the Q to asus-support and to bios-makers from asia (why the default is so ugly)  Huh
member
Activity: 388
Merit: 13
I set my Corsair Vengeance to 3633 Mhz @ 16-17-17-34-50 timings.

Not great performance, though. 11000 H/s.

What am I doing wrong?
member
Activity: 388
Merit: 13
And why would you run your RAM @ CL 26?  Huh
legendary
Activity: 2026
Merit: 1005
Ok, that makes sense.

I still haven't tuned memory timings.

I have 2x8GB Corsair Vengeance RGB 16GB DDR4-3466MHz CL16 (CMR16GX4M2C3466C16)

Memory runs fine @ 3466 spec and higher (but it starts to relax timings).

Anyone knows what memory dies brand are in this?
3700X @4GHz:
DDR4 3600MHz auto   (CL26) - 6.8Khs
DDR4 3600MHz tuned  (CL16) - 8.4Khs
+23.5% - because of tuned RAM  Grin

UPD 28/11/2019: decr. trfc from 345 to 278 gives +150h/s, so it pushes 8550h/s so far
member
Activity: 388
Merit: 13
Ok, that makes sense.

I still haven't tuned memory timings.

I have 2x8GB Corsair Vengeance RGB 16GB DDR4-3466MHz CL16 (CMR16GX4M2C3466C16)

Memory runs fine @ 3466 spec and higher (but it starts to relax timings).

Anyone knows what memory dies brand are in this?
member
Activity: 116
Merit: 66
On another topic, why is system RAM speeds so important for RamdomX?

Isn't it supposed to run on L2/L3 cache, and that's why it performs so well on Ryzen's?
Because it uses 2 GB dataset in system RAM.
member
Activity: 388
Merit: 13
On another topic, why is system RAM speeds so important for RamdomX?

Isn't it supposed to run on L2/L3 cache, and that's why it performs so well on Ryzen's?
member
Activity: 388
Merit: 13
Watercool your 3900x.

I went from 85ºc with stock cooler with lots of fans and open case to ~64ºc with watercooling, plus + 166 Mhz boost for free. No overclocking.

I wouldn't be confortable runnig a CPU @ 85ºc 24/7. It will fail, sooner or later.
hero member
Activity: 2492
Merit: 761
It will be used for mining also.
My plan of this setup is.
MSI B450 Tomahawk max motherboard
2x3600mhz ram
2xRX5700
Ryzen 9 3900x

So not to waste other hardware i can do dual mining for example with GPU i mine ETH.
Also can use it as gaming and rendering bench.

In such a way you are getting not a rig but a serious worstation that you can use in any way: for games, for mining, for work. If you will use it only for mining ROI would be really huge. Its nice decision.
copper member
Activity: 406
Merit: 59
1xRX5700 for image
nice GPU "for image"  Grin Grin Grin
It will be used for mining also.
My plan of this setup is.
MSI B450 Tomahawk max motherboard
2x3600mhz ram
2xRX5700
Ryzen 9 3900x

So not to waste other hardware i can do dual mining for example with GPU i mine ETH.
Also can use it as gaming and rendering bench.



copper member
Activity: 406
Merit: 59
Thanks for taking the time to put together this information, it really helps when deciding if its worth using these to mine or just get one for a kick-butt editing system. Memory seems to have a big impact on RandomX so I will be interested to see how it impacts the hash rate. It makes me wonder what kind of impact the new Threadrippers with quad channel memory will have on mining performance compared to dual channel.
Thank you for feedback
3rd generation Treadripper should be out soon, havent really followed they release date. Price range seems attractive.
It would be great if we would get some dual CPU boards for them.
At the end of it it will come to price per hash 🤞
legendary
Activity: 1049
Merit: 1001
Thanks for taking the time to put together this information, it really helps when deciding if its worth using these to mine or just get one for a kick-butt editing system. Memory seems to have a big impact on RandomX so I will be interested to see how it impacts the hash rate. It makes me wonder what kind of impact the new Threadrippers with quad channel memory will have on mining performance compared to dual channel.
hero member
Activity: 2492
Merit: 761
1xRX5700 for image
nice GPU "for image"  Grin Grin Grin

anything over 80c will destroy your cpu in a few months
If you have several CPU, you can exchange them under warranty. I think you can get the full price for several months of use.

It always amazes me that some people would run the CPU/GPU hot rather
than run the fans hard. Fans are cheaper to replace, but I haven't had one fail
yet in 5 years, Just clean them regularly.
I think the same. I have now 4 GPUs with 120mm fans that looks bad but works normally
copper member
Activity: 406
Merit: 59
It always amazes me that some people would run the CPU/GPU hot rather
than run the fans hard. Fans are cheaper to replace, but I haven't had one fail
yet in 5 years, Just clean them regularly.

as long as you dont go higher than manufacture's maximum rpm then is okay,

A GPU a fan failure under warantee should be covered regardless. A failure
of a 3rd party CPU cooler could be blamed on the mobo for overdriving it.

I have my fan curves set for 80% @ 70C rising to 100% @ 80C. The cooler algos
(and cooler weather) don't run the fans as hard.
I think you need to find that balance to not overpay by every hash. In some cases it might be better just to reduce the OC and get reduced 10% hashrate and power then purchasing expensive cooler. Everything comes down to OPEX and CAPEX.
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