Vega 56 and Vega 64 guide

angryMiner · June 29, 2021, 11:18pm

Hello guys!

This is my AMD rig:

GPU 0 - Reference Vega 64
GPU 1 - Asus Vega 64
GPU 2&3 - Gainward Vega 64
GPU 4 - Gigabyte Vega 56

I’m ending the set up of the straps, so I dont post them yet, but there’s nothing special, just step by step and slow work. RRDL at 5 for all cards up to now.
I’m really enjoying this kind of job, Nvidia 3000s are more much boring! lol

But the only I don’t understand, its why there’s that big difference of temperature between both gainward cards, similar power consumption, and new thermal pads for both… 11 celcius is a world!

Any idea?

angryMiner · June 30, 2021, 12:22am

And then there’s the ICU…

This card is not working fine, so it was mining @ 44MH/s with no straps for the moment. With ss-silver straps now it’s mining @ 49MH/s and still stable.

amdmemtweak --RC 38 --RAS 26 --REF 21000 --RRDL 4 --RRDS 3 --RCDRD 12

It’s a reference GB Vega 56, and fan won’t work over 40%, so it gets so hot. I think I will try to connect the fan to the motherboard or molex, because with better temps i would probably be able to put decent straps.
This is happening since i clean up this oxide:

Hope dont go worse.

So thanks for the straps =D

Smining570 · June 30, 2021, 9:57am

i have on my 3 ref 56 same oc on all, with proper cooling i can run them mem1020 vdd815 core 1100
straps amdmemtweak --RC 37 --RP 11 --WR 13 --CWL 8 --FAW 12 --RAS 22 --REF 65535 --RFC 239 --RTP 6 --RRDL 5 --RRDS 3 --WTRL 9 --WTRS 4 --RCDRD 12 --RCDWR 12
These gives around 55.4mh

Did one new ref card´s paste, i didnt had in hand any pads, only 1,5mm pad for the small chip that is a bit low on the board.

There was still factory seals, a virgin, thermal paste was hardened really bad, shame i didnt had 1mm pads, will open it again later. So after thermal paste and 2 small thermal pads, it was running with core around 62c and mem 73-4, now core 52c and mem stable 71c.
sneak peak to mining chambers if u want, take a look.

Show us your rig or rig´s!

oni · June 30, 2021, 11:00am

Thanks again for this great finding!
For the purpose of testing, this morning I also lowered it to 4 on my 2 Vega’s that kept crashing in B-mode and you know what? Now already 4h30 up and counting!!
After 24h test I’ll start lowering their clocks and mems too so their temps decrease to the same level as the others

Must test that 1027 too one of these days

oni · June 30, 2021, 11:08am

Nice!
I’d rather not post on YouTube myself, but maybe we could start a thread somewhere in the hive forums if it doesn’t exist yet?
Also curious about all your setups

oni · June 30, 2021, 11:16am

When repasting the GPU/HBM I have noticed that when remounting the cooler, you have to really really tighten the screws or there can indeed be a big difference. I haven’t had as high as 11°C though, but had up to 6 to 7°C in the past which disappeared after repasting again and tightening.
Don’t know if your issues are related, but might be worth investigating.

Smining570 · June 30, 2021, 11:24am

First rig in video, dungeon´s is 6x rx570 ±180mh. PSU 850W.
Second rig is 7x vega´s 56/64 ± 430mh. 1600W + 750W.
Small on the floor is new, bought used mb for 60eur had all other components with 1x rx580 and bought 1xref vega56…that is still not ready. ±83mh 750W.
Fourth rig is 4x rx590 + 3x rx580 ± 220mh. 1350W.
When normal temps these produce about 930mh.
On vega and 5xx rigs there is H110 pro btc MB´s. 6x570 have some older asrock and "new"one is Asus something with 4x pcie without splitters.

Total from the wall is around 3,5kW.

Yeah, i understand youtube etc, thats fine, maybe just a photo would be good if someone want to share , it goes on the side with some random post

oni · June 30, 2021, 12:27pm

You sure? That’s about 61.4MH/s per Vega. Then you’ve found some amazing straps that you haven’t told us yet

I’ll see what I can do

Smining570 · June 30, 2021, 12:42pm

right…8x vega´s on that one

ss-silver · June 30, 2021, 2:12pm

@Smining570 thats sick
I just got these two little guys, the custom server box one looks cooler but runs cards about 2-3 c hotter due to limited spacing between the cards.

^ the bottom card here is the 64 with Morpheus cooler and noctua fans

Smining570 · June 30, 2021, 2:29pm

wery clean, i love the box fans, havent found right size so ordered one floor fan for hot days. So in server box they run hotter, those are delta fans,right? must be really good rig that one, wouldnt mind to get one really nice

oni · June 30, 2021, 5:07pm

Ok, my turn now

I first started small in the garage; but there is not enough ventilation so it got too hot in there when I got to 13 gpu’s, so I moved the rig to the back of our house into a toilet which we didn’t use anymore

The backdoor was always open to ventilate, even during subzero ambient temperatures

Don’t look at the (non-existing) cable management

On the bottom is my test computer for 1 gpu. I’m planning for a bigger test rig but lack time lately.

Then in the basement I created some box from old metal racks. The side panels can be removed for maintenance on the rig, and I have mounted 2 industrial fans on the basement exit, one for fresh air intake and one for hot air exhaust. I can make change their speeds depending on how hot it gets. On full power they consume 230W each and make more noise than the rig itself

The 13 Vega’s run on an ASRock H110 Pro BTC+ mobo and are powered by 3 PSU’s totaling 4200W, but pull only ~2400W from the wall (or in B-mode even less, see one of my earlier posts).

I still feel I can improve it a lot, like maybe a dust filter and isolate it for noise and heat, but lack time

Austbost · June 30, 2021, 7:20pm

@oni Thank you for the suggestion of resetting OC’s I was able to get rid of the DPM

@ss-silver I added the tweak along with setting the VDD to 825 and I am still having no luck. Number of invalid shares has slowed down but its not stable… ie shutting down every 20 mins.

What should I be trying to get this thing stable. I will worry about increasing mh later on all my vegas

oni · July 1, 2021, 6:42am

Unfortunately one of them died a lot during the night, the original 56.
But the 64>56 didn’t! (But as the 56 died a lot I don’t know yet if it keeps stable by itself this long).

I now lowered their clocks to 1050 but kept their vdd high. Will see if that keeps them alive.

Smining570 · July 1, 2021, 8:34am

that metal frame with fans is insane! mail man brought to me allso a bit bigger fan yesterday, but this your setup with doubble fans and frame that u can modify like that must be perfect for all ambient temps. Still trying to figure out best place for this exhaust

oni · July 1, 2021, 4:35pm

nope, both of them are dying again

thanks!

unfortunately they don’t cool the ambient air; they just make sure there is more air flow, but if it’s hot outside, the hot air is blown over the gpu’s so I see their temperatures rising anyway. But the hot air from the gpu’s is also exhausted better, so overall it should be a better setup, but as mentioned above, when outside temps go >23°C I have to tune the gpu’s down to keep their HBM’s at 70°C max.

fizz · July 1, 2021, 10:32pm

hello,

i have a gigabyte vega 64 flashed to 56 (gpu 4), i tried so many straps but it crashs with any --REF
any advise? thanks

and none of my cards can run over 950, 960 mem, invalid share or crash!

cuthy2k · July 2, 2021, 2:46pm

A couple of nice set up here! good job guys.

I treated myself to a third vega 56 this week and have just installed. The price on fleabay is coming down, picked up a powercolor for £395 which I thought was a good deal.

My Vega rig currently is as follows for a nice 231MH. These cards are beasts for their age. I’ve another 56 in my gaming rig but it will stay put for the meantime ha!

danielvm · July 4, 2021, 4:41am

I love this GPU (no bios mod)(unfortunately it is not stable as I expected)

amdmemtweak --CL 20 --RC 38 --RP 12 --WR 14 --CWL 8 --FAW 12 --RAS 26 --REF 21000 --RFC 248 --RTP 5 --RRDL 4 --RRDS 3 --WTRL 9 --WTRS 4 --RCDRD 12 --RCDWR 12
amdmemtweak --CL 20 --RC 38 --RP 12 --WR 14 --CWL 8 --FAW 12 --RAS 26 --REF 21000 --RFC 248 --RTP 5 --RRDL 4 --RRDS 3 --WTRL 9 --WTRS 4 --RCDRD 12 --RCDWR 12

oni · July 5, 2021, 7:52am

what are the stability issues that you’re encountering? dead gpu’s or rejected shares?
if those are original 56’s, your mem is set very high, maybe downtune a bit to 1020 to see if that is already more stable?