Quote from: Dr_Victor on September 29, 2020, 05:52:04 PM

Quote from: juicyM555 on September 29, 2020, 02:16:50 PM

Hello guys, your help would be aprreciated

I have few vegas64 reference samsung memory on me (gigabyte, powercolor, amd) and unfortunately have a hard time setting them to be as efficient as they could

First I tried amdmemtweak with hiveos but couldn't get the results I wanted not even close, still was about 250w from wall (in this post all wattage will be from wall), so I switched to windows 10 and started getting more interesting results as I went through almost every page in this thread (thanks for sharing your settings btw)

Bassicaly I'm aiming on low power consumption because my electricity isn't that cheap here - 0.16$/kwh

These are my best results

--CL 20 --RAS 30 --RCDRD 14 --RCDWR 6 --RC 44 --RP 12 --REF 11700 --TRFC 260
https://imgur.com/a/bPlLOdi

- I was getting 47.2 mhs, 175w draw, after 3 min it always drops to 46mhs but it's stable

I wanted to get lower with power consumption as I found out one guy in our local forum posted he is getting 42mhs with around 100w power draw on his vegas 56, so I flashed one of my vega64 to 56 bios and applied the exact setting as he did, the hashrate was exactly the same around 42mhs but i got only to 165w

Here you can see the settings
https://imgur.com/a/M81meD4

I can see some users getting very nice results with 50mhs+ and low power unfortunately the discussion ended

Quote from: Munhenhos on May 30, 2020, 04:43:49 PM

Quote from: pbfarmer on May 27, 2020, 07:23:03 AM

Quote from: gmturner on May 26, 2020, 10:38:01 AM

Quote from: pbfarmer on May 26, 2020, 01:00:01 AM

Quote from: gmturner on May 23, 2020, 12:57:29 PM

would someone please be able to help me out with some vega 64 timings and clocks and maybe ppt tables to get power usage below 200W at wall? been getting 48mh @200w from wall from each card, i imagine i can do better.

Settings in pic run ~168w/GPU including idle ATW (120v, 1600 plat PSU). amdmemtweak params are --RAS 30 --RCDRD 14 --RCDWR 6 --RC 44 --RP 12 --REF 11700 --RRDL 4

Thanks mate ill give them a run. im on windows though and dont think i can get voltages down that low without powerplay tables? think its capped at 900mv.

You can use ODNT to easily create a PPT similar to my clocks/voltages listed on the right. Only difference is that you may need to use mem P2 set to 1028 (and lock out P3), in order to take advantage of the power savings of a reduced SOC clock.

Btw, if you really want to get crazy, there's been a lot of noise about flashing a 64 w/ a 56 BIOS (yes, the reverse of what most people have been doing) to get higher hashrates at lower power. Not sure which models this actually works for tho, and haven't tried it myself... yet.

i'm getting 54Mh (samsung) and 50MH (hynix). 930W on the wall for 6 vegas (all flashed 56). 900W on the wall, plat PSU.

I will study more and want to play with core and mem control more but I dont understand it fully yet and always when I change it, it lowers hashrate and draws more power Grin

, I saw some users setting OD_SOCLK and also values for OD_SCLK, OD_RANGE under linux, I also downloaded ODNT but can't see these settings there also when I apply first amdmemtweak then odnt the miner just won't start (im using TRM) ... Could somebody please share their low power cons setting for vega 56/64 or advice me which values shoud I try tweaking , thank you very much

Vega 64 Samsung
---------------
In short, try the following for a 50-51 MH/s setup:

1) Set clocks to core clk 1075 MHz, mem clk 1107 MHz, voltage at 850
mV. Your card may need to clock down the mem clk to 1050-1080 MHz
to be stable with no hw errs.

2) Use the following modded timings:

--CL 20 --RAS 30 --RCDRD 14 --RCDWR 12 --RC 44 --RP 14 --RRDS 3
--RRDL 6 --RTP 5 --FAW 12 --CWL 8 --WTRS 4 --WTRL 9 --WR 14
--REF 17000 --RFC 249

3) Hopefully it runs stable and you should observe a hashrate around
50.5-50.9 MH/s. If your GPU can't handle the timings, you need to
relax them to less aggressive variants available in the AMD mem
tweak thread on Bitcointalk, or come join the TRM discord for
further suggestions.

4) For better efficiency (but lower hashrate), tune down your core clk
and try to further lower voltage while remaining stable.

5) We reiterate: _blast_ your fans and monitor your HBM temperature.

Unfortunately, this will never be efficient / low power as the 1107 mem clock also requires an 1107 socclock, which eats power. That's why i run at 1028 mclk, and why flashing to 56 bios is even better. Besides dropping your actual mem voltage ~100mv, i believe the 56 bios also uses a different set of timings which make the 900-950 mclk range quite performant, which means socclock can be run much lower too.

pbfarmer

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