Because that is about all you get by what you have done. Did you make a special bios for each card? Or are you using a mod'd bios that is stable and works on all your cards? If so, can you share it? I have played with the 24 Sapphire rx 480 8g cards I have for days, and they seem to be very touchy with any change to voltages. I have done what you did using WattTool and got the same results. If you want to increase your hash rate without raising your power consumption by much, increase your mem clock speed from 2000 Mhz t0 2200 Mhz (some will run there, some will need to be backed down a bit, every card is different) and you should get up to around 275 H/s per card.
Now a question for those that know how to use WattTool and are experts at undervolting. I have lowered the last two straps on the GPU mem to match the 5th strap and I was able to lower the power consumption for a 6 card rig by 130W down to about 1100W and sustain a total production rate of 1650 H/s by raising the mem clock speed to 2150 Mhz. What other tricks are there to lower power consumption and still remain stable? I don't really know what the other tricks are to getting my power down using this tool. I can lower the mem voltage by 50 mV on most of my cards but I don't see much reduction in power consumption, however I do so an increase in errors and cards dropping off in the "Open CL" hang up. Any help would be appreciated.
Hi Swiped,
I made a custom BIOS, all card are unique and wont take the same settings, unless you are very very lucky.
Most of them are mclock around 2130 for stability issues and power consumption.
I also reduce the voltage around 35 to 45, depending on the card.
Takes awhile to get the system stable, so you do it once card at a time.
PM me for more details
