Post
Topic
Board Mining (Altcoins)
Re: Genesis Mining Presents: sgminer-gm - with Ethereum support!
by
michkima
on 25/09/2016, 11:34:48 UTC
After looking at my HW errors and explaining to someone last night in another thread what xI vs I vs rI it occurred to me that the shotgun approach I was using was flawed.

At the settings I was using I was making the GPU work 10 times harder and essentially getting 33mh by loading up the work and accepting the HW.  

So today I used some reasoning- although it is limited by my understanding of "4-way" vs "8-way".  The other quote I accepted was the one made by Oh-God-it's a Girl earlier in this thread.  SHe stated that HW errors are normal, when in fact they are not normal.

So I started from scratch using the info I have on hand.  Global work has been accepted as 16384 or a variation of that number.  Plugging that into the xI formula and knowing a 390 has 2818 shaders the xI equivalent would be about 5.81.  It decreased the HW works but hashrate is about 20mh.  I then decreased the worksize by a factor of 4 to 64 (only because everything in mining is a factor -lol - and we went from 8 way to 4 way) and I increased the the xI by 2^4 and get about 93.  Also increase the xI without decreasing the worksize increased HW.  Plugging those numbers into the miner I am getting respectable Hash rates of about 28mh on a 390 with 1100/1250 with very few HW.  

A little more tweaking and will increase the worksize and double the xI since it appears more threads are available with this miner using 4-way (at least I think)

What is your GPU thread? one or two threads?

With 1100/1250, you are getting ony 28MH. That is slower than the Claymore miner speed.