I don't think it's power related... I've got mobo and 2 cards on a 750W Gold and the other 3 on a 1000W Gold. I've looked at the logs, Alexis is the miner that crashes in 90% of cases. Tribus crashed twice too. Disabling them altogether and testing now again for 24 hours.
On a sidenote, the Spmod miner uses powershell... But that closes straight away for some reason and doesn't work at all. Very weird.
I choose 4 algos
skein
neoscrypt
nist5
lyra2RE2
Then I took nemominer .... and made it so it mines at hashrefinery and at zpool.
https://mega.nz/#F!RPxCFBhB!ihNABH6KCFtebjOgdX1p3g if yah wanna try it out. Just change the btc address.
don't forget to mention you also need to change the name in start.bat from "NemosMiner-v2.0.6.ps1" to Ultimate_final.ps1