Just an update about my rig and how I temporarily fixed my hang issue.

I have a rig with 6 rx470s and ever since version 12.0 i have had issues with one of my GPUs hanging. I would have to restart the entire system every time this happened which was quite often. The last stable version for me was version 11. So I compared the differences from the two versions and the only thing I noticed was the different mining algorithm. All 12 versions defaulted my 470s to the faster ASM algorithm which worked fine on all my GPUs except one. the one that kept hanging. so i changed the algorithm for the GPU that was hanging back to the original one and I haven't had any issues since on version 12.3. My config file looks like this.

ZecMiner64.exe -zpool ssl://eu1-zcash.flypool.org:3443 -zwal zcashaddress.YourWorkerName -zpsw x -asm 1,1,1,1,1,0

0=card 5 (the card that would always hang)

Hope this helps!

The dev fee is a bit ridiculous but still not bad enough to not use his miner. I have been running the miner for about 4hrs now with with no issues. And I am using flypool to compare the two.

Silentarmy vs Optiminer results

I'm running ubuntu with 6x rx 470 8GB

With SA I averaged 520 sols/s using 700W
With Optiminer I'm averaging 660 sols/s using 740W

That is about a 27% increase in speed and this is all with the 15% dev fee included already.

I'm going to have to stick with Optiminer until SA releases a faster Linux miner.

About 700w

http://i.imgur.com/PM3s0Pp.png 6 rx470 8GB

 new to this. how do you upload an image saved on ubuntu?