Just Redid my settings and came out better:
1015 H/s
7 MSI RX470s
968 Watts at the wall
68 ave Watts (MSI Afterburner)
57C ave GPU Temp (MSI Afterburner)
49C CPU Temp
1500 Strap
MSI Afterburner settings: 1950 Memory Clock, 1200 Core Clock
My main goal is profitability = W/Hs (less is better)
Previously I was at .97 W/Hs
I am now at .95 W/Hs
To Undervolt I would loose efficiency and hashrate. I also get more Hs and no Errors/Rejects! Very Stable as well.
1015 H/s
7 MSI RX470s
968 Watts at the wall
68 ave Watts (MSI Afterburner)
57C ave GPU Temp (MSI Afterburner)
49C CPU Temp
1500 Strap
MSI Afterburner settings: 1950 Memory Clock, 1200 Core Clock
My main goal is profitability = W/Hs (less is better)
Previously I was at .97 W/Hs
I am now at .95 W/Hs
To Undervolt I would loose efficiency and hashrate. I also get more Hs and no Errors/Rejects! Very Stable as well.
Wow Aries that is very interesting! So, it looks like you got +30 h/r (with only +13W) just from changing clock speed from 1150 to 1200?
And am I to understand that you have eliminated under-volting altogether on this rig? If so, was the under-volting reducing your h/r?
Overall, did you see any wattage or temp increase vs v5? Also, are you leaving your v6 at the default "i 4"? Did you experiment with the different intensity levels at all? Curious to know what h/r & wattage difference intensity makes in this version.
Good Questions:
I only underplot if the mV in the P7 is over 1000. If they are over 1000 i will use the voltage offset (x6.25mV) to get it down to 1000. This is usually with GPUs that are under 73% efficiency.
The if I undervolt, there will be a change in the watts, but not in Hs or temp.
I am leaving the default "-i 4" as is. I did not experiment with any others.
Thanks for the questions. If you want to see this unit, see: https://bitcointalksearch.org/topic/gpu-mining-rig-eth-zec-6-or-7-gpu-1676763
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