You either need to change clock speeds, either OC or underclock use in cgminer "--hfa-hash-clock 600", I see from ex that the die's like to run over the 70-80 C , from your post you have one core in in the 51 C/.82V which tells me that core that is not working also you can see that the V is high as to the nominal output in V is .79..
--hfa-hash-clock
CurcO thanks for your answer.
I found that
-using HF image on RPI with cgminer 3.09 -> cgminer says 490ghps
-using cgminer 3.12 on windows -> cgminer says 250ghps
-pool says 250ghps
I tried over/underclocking it in the range from 500-600mhz, underclocking makes it slower, overclocking makes it faster (max average I saw was 300ghps - far away from the 400+ other are getting)
Could it be an issue with PSU / connectors?
What is your HW count (hardware errors, its on the top line of cgminer output)? You probably have the same problem I do. Which is, cgminer things its hashing fine but its really gettings tons of errors due to some defective cores. The reason why the temps are lower is probably because much of the chip isn't actually hashing due to errors. Also what is your WU rate?
In cgminer, my bj shows 400+ GH/s (at stock frequency) but only 230 GH/s in eligius. As of now, there is no way to fix this. Perhaps a firmware update might fix it. But if you manage to fix it, let me know.
