Ijust cant get anywhere near the power savings in linux that I do in windows with powertune. when I undervolt core and mem, I can see it shave some watts, but nothing like windows using powertune.
Does anyone have experience with changing TDP (w) TDC (a) and Max Power Limit (w)??
I tried to lower them, but it doesnt seem to do anything… on a MSI rx470 bios (v213) I tried
TDP was 85, now 70
TDC was 107, now 99
Max (w) was 110, now 100
Hi guys,
I’m struggling like hell with stabilizing this miner. I use Windows 10 with Crimson 15.12 . The rig has 6 x HD7970 , 3 GB RAM, and dual core intel celeron. So far i managed to mine with 4 of the 6 GPUs.
I tried with Claymore v10, v11, and v11.1. On all versions if i add the 5th card, one of the cards hangs in OpenCL call and Claymore restarts itself. For a short time before crashing , that GPU appears with 0.00 H/s. i tried every possible combination between the 7 PCIe slots on the mobo and i concluded it’s nothing wrong with any of them or with any of the GPUs . I also uninstalled the driver with DDU and reinstalled several times but to no avail…
Also when one of the GPUs hangs , the driver crashes and a message informing about the crash pops up in the right (AMD driver has stopped and recovered or something like that …).
Moreover, sometimes when i add the 5th or 6th GPU the windows crashes (BSOD with atikmdag.sys).
I decided to move on Linux maybe it will be more stable.
What distro do you suggest given my hardware? Please help ! And share your experiences
Ubuntu 14.04.3 (the latest you can get and retain the fglrx (15.302) drivers). That’s what I’m running. Also, I have a few cards that will choke/hang occasionally unless I lower the default/auto intensity on the command line to “-i 3”.
yeah from what I read its a pain in the butt, and im not even really sure how to undervolt properly in linux
need to patch the linux 4.8 or 4.9 kernel… then change a bunch of settings in amd overdrive or something
heh… i dont even think im using 4.8 or 4.9 kernel so I just forgot about it…
have you found any way to undervolt on linux ? this is my main concern not the speeds! On win i have -130mv the 480 and oc from 1750 to 2200 100% mining stable…i wonder if this could be possible on linux. I am using trixx for undervolting if anyone wants to try!
Sorry, I have not tried undervolting the GPU’s. Does it end up using a lot less electricity? Enough to make up for possibly voiding the warranty and not being able to replace it during the 2 year warranty period?
Moded 8gb 480s eat around 110-120W, and do 270-280Sols/s, on windows. On Linux i’ve seen them do more with Optiminer.
Waranty will be voided if you change your BIOS, but hey everyones doing it and nobody got caught… yet.
stock power usage is about 150W. A 30 watt power savings is about 2 kwhr per month, or $0.20. If I had 100 cards, that would be $20 savings per month, or $240 per year.
How long does it take to modify the BIOS, and how easy is it to do without breaking the GPU? 1 broken card not replaced by warranty out of 100 means it wouldn’t save me anything at all.
Also, I ran the numbers on whether to use the Sapphire Nitro R9 Fury or the RX480 for Zcash mining, taking into account power, hash rate, and system cost. Fury comes out way ahead.
According to this Ubuntu page, the HD7970 is based on the Tahiti chip, and it is supported by Ubuntu 16.04 and later operating systems. You should be able to use it right out of the box, possibly without installing any drivers at all. https://help.ubuntu.com/community/RadeonDriver
Thanks for the heads up - just switched to it. And figured out how to turn up the intensity to 7. on ubuntu 16.04 with AMD 16.50 drivers. With stock BIOS on GPU’s: after increasing intensity to -i 7
RX480-8G - 290 S/s
Sapphire Nitro R9 Fury - 440 S/s
I also added a howto on my website for building it