just updated my boxes to claymore 11.1 linux - the GPU’s are stock, no modifications
R9 Fury gets 420 H/s
RX480 8G gets 260 H/s
R9 Fury:
RX480:
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?
I use Ubuntu 16.04 with latest amdgpu-pro drivers. I build it to run headless and unattended. Here’s a complete build how-to I wrote up:
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.
I only have HD7970 GPUs . Will it work on Ubuntu 16.04.01 with 15.302 drivers ?
I don’t know about that. You probably need to use Ubuntu 15.04 with the fglrx drivers.
See AMD linux driver list per card:
Ubuntu 16.04 works best with the AMD GPUPRO drivers. This page shows that cards that are supported by AMD driver version 16.50
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
im doing around 500 with my 7990, 15.12. win 10
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I didnt change the bios just with TRIXX tool i reduced the voltage, it doesnt break the guarantee!!!
ok, I’ll check into that. Just switched one of my boxes to optiminer 1.4 also.
Optiminer v1.5 just came out.
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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
Hi Mastercarlox
what settings have you got for your cards?
I’ve overclocked mine to 1000 but just getting 233
I have 15.12 drivers ?
Thanks in advance 
Hi.
Stock BIOS, 1100/1500. 1.2V. Power Limit +20%.
Crimson Relive 16.12.1
And in the bat file i have this:
setx GPU_FORCE_64BIT_PTR 0
set GPU_MAX_HEAP_SIZE 100
set GPU_USE_SYNC_OBJECTS 1
set GPU_MAX_ALLOC_PERCENT 100
set GPU_SINGLE_ALLOC_PERCENT 100
ZecMiner64.exe -zpool ssl://us1-zcash.flypool.org:3443 -zwal t1RdJ5aFaHAunBsbhTY8BWUD8ysFZLT4RaZ.GPU -zpsw x -allpools 1 -i 8 -r 50
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Hi! Thanks for the help man. I switched to Ubuntu 15.04 with AMD proprietary drivers(downloaded from their site). The rig sees all 6 GPUs but still, when i start Claymore v11.1 the GPU 4 shows 0.00 H/s and after a while hangs in OpenCL call. Idk what could be the problem . The GPU or the riser it is certainly not because i tried with many risers and GPUs which are working in other PCIe slots.
I marked with red the PCIe slots where i try to install the 6th GPU( which is recognized ad GPU4 by Claymore).
Idk if this is important but the monitor is connected to the PCI_E2.
I started the miner about 30 minutes ago and from what i see it pulls 1110W from the wall ( 5 x HD7970) , the hashrate is 1180-1185 H/s and the temps are between 66-67°C (CPU0 the hottest , has 2 vents) and 58-64°C (the rest of GPUs which have 3 vents). The vents work at 100% speed because they are connected directly to the PSUs this being a custom setup made by the guy from who i bought the rig. Whay do you think ? is it ok ?
And what is your power supply rated at? Is it enough juice for that 6th gpu?
Power is not a problem at all…I have 3 x Cooler Master RS-700-ASAB-L3.
3 x 700 = 2100W
