It does the same thing with Litecoin as well.
I have been working on gpu setups as you can see in my previous posts. My R7-250 starts out at about 96kh/s and gets up to 120 to 124 kh/s and then after about 5 mins drops to 100kh/s. A couple of different settings I have worked on actually started out at 164kh/s reliably but always after a few mins lower quite abit usually back to the 100kh/s range. I assumed it was my code and went back to the first one I used.
Now I'm not so sure.
I agree, but, i use MuM to mine coins based on coinchoose api, not multipool "own" profitability-difficulty algorithm. In other words, i ve created about 7-8 coins in MuM, all of them have their own port, i m not using the multipool auto switching port.
Maybe it's hardware specific? I don't see this issue on a 5770, 7950, or 7970. That's on any Scrypt coin.
Does it happen outside of MultiMiner? You can try launching bfgminer with the same arguments found in the Process Log
If it does happen in bfgminer, can you try older versions of bfgminer to see if you can find a working copy? If you can find a version where this works, I can walk you through an online process that should identify when/where this got broken.
This goes for anyone having issues. If you can pin it down to occurring outside of MultiMiner, in bfgminer, and you can find an older version of bfgminer that works we can go from there.
I will do this and see what I get.
Both setups are brand new and I have shaken them both down quite well to eliminate issues.
Hopefully I can find something that helps using your advice.
The drop off is really weird when I add the shaders into my code. It runs really well at 164kh/s or so but the drop back is really a bummer. It runs stable and cool as well.
On the other side of the coin though my ASIS's with this version of MM really shine. Even the little 333 erupters actually run at 370 to 380 with no special tricks or tweaks.
This is fun though digging and troubleshooting.
Still I am looking forward to when my R9 270 gets here for some real hashing power.