currently looking at BIOS setups for the RX480 to see if any thing can be done about the speed/power
It seems speed wise 15SOL/s is about what you are going to get. low Core and Lower mem has little impact on the speed there for the bottle neck is some where else, I believe its the mem bus bandwidth but will leave that explanation for someone else.
So with no perf increase available I looked at power, as little point running these at full power or core/mem speed if there is simply no gain.
The red devils don't even bother spinning the fans they passively cool them selves with the ref cards only at 800rpm
My Setup for testing this.
GPU: 2x REF RX480 + 2xRED Devil RX480
BIOS : STOCK
Tools used: WATTTOOL 0.9.2
MOBO: ASROCK H81 BTC
Proc: Intel 2160 i3
Drivers - From windows update.
Speed [300 sec]: 30 I/s, 60 Sols/s (varies but this is approx. avg some times more some times less)
PSU: EVGA 850 P2 @ 230v
@wall Total system 280W (with CPU doing 2 threads and all 4 GPUs)
This is my BAT file:
BAT file contents:
start WattTool-0.92.exe GPU0-z.ini
start WattTool-0.92.exe GPU1-z.ini
start WattTool-0.92.exe GPU2-z.ini
start WattTool-0.92.exe GPU3-z.ini
nheqminer_zcash.exe -l eu -u t1Vc2YbodB6xfwMBqfJh2UU5XkKHihyHpWM -t 2 -od 0 1 2 3
example gpu0.ini fro watttool (red devil)
PS: there is possible more power savings to make but its so low any way.