my GPUs simply come up and report OFFLINE or DEAD, but going back to Scrypt seems to work fine.
Scrypt-N is more intensive and will tax your GPU to the max, chances are that your GPU settings are not stable enough so they keep crashing.
It's somthing more than that, because I have several rigs which run scrypt fine.
I converted to vertminer and they were all DEAD.
I then tried a bunch of setting changes, including removing almost everything and letting vertminer choose the defaults.
Still, everything comes up DEAD, even at intensity 8.
Switching back to Scrypt, everything runs fine again and I get good hashrates at intensity 20.
So, in summary, there is either a problem with how vertminer chooses default values, or with the scrypt-N running on certain brands/models of GPUs.
Then it's a RAM issue, how many and what GPUs are you running and how much RAM are you using?
usao: You do not need to have more than 4GB of RAM per rig, granted, the more the better but it will most likely not solve your problems. What version of vertminer are you using? The 5.2 version on the site does not seem to work, at least for me. I was only able to get 5.3 to work. Here is the link to the 5.3 download:
https://www.dropbox.com/s/5n70hj3izjj64y1/vertminer-0.5.3.zip. As for the 7850 settings... those are a bitch. Here are the settings I got to work and get about 140K from each.
vertminer.exe --scrypt-vert -o stratum+tcp://stratum.vertco.in:8080 -u UserName -p Password -v 1 -w 256 -I 14 -g 2 --lookup-gap 2 --temp-overheat 85 --temp-cutoff 90 --gpu-engine 1000,1000 --gpu-memclock 1300,1300 --thread-concurrency 4096
Hope that helps. The pain in the ass is getting the thread-concurrency value right.
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