Hi,
I have 4x1070 8GB OC:
miner: Clymore 9.6
Windows 10 64
Current hashrate for each card is 25Mh/s and very stable.
I want to know is there any way to increase hashpower without overclocking?
you can lower watts used
load msi afternurner 4.3
set tdp to 80%
leave core at 0
leave ram/mem at 0
set fan to 70% manual
hash should stay the same but power usage will drop.
You should be able to overclock the memory still, and maybe even bump up the core clock if your card has good cooling. At 80% it will throttle the core possibly to keep power down ac necessary. I run my 1070 at 65% with +50 core and +230 memory in afterburner. Much of the time the core throttles down to 1810, but it is there just in case. The 1070s run at 55c and only use about 105 watts. I have played with power settings so much. I ended up having to tweak that low to conserve wattage draw.