Could be power draw as well, if the crashing persists. What kind of PSU are you using?

CPU mining is pretty much only worth it if you have an exceptional CPU like others have said. ETN is probably the best bet, but even then... the returns are pretty low.

As with any hardware, you also need to be careful when it comes to temperature and stability. I Mine ETN on one of my rigs, but I have a water cooling heatsink on it. I probably wouldn't bother if I couldn't keep the chip cool.

Pretty obvious they have been "testing" them for a while now too.

Setup looks decent so far. As others have said, it shouldn't be too loud overall, at least not so much that it would be an issue with neighbours.

Could try to design it like a server farm and have a wind tunnel in the middle.

There are some good sites that focus on JUST Cryptonote or Scrypt, or whatever. What coin algo in particular are you looking for?

Agreed with the others, may be a compatibility issue with a Windows 7 vs 10 issue.

I've personally found that the Nitro+ 570s can be a bit touchy with BIOS modding. I have one that will NOT take a bios mod, no matter what process I use.

8.29 cents per kWh. Canada.

That's in CAD as well. Hydro power.

Did you BIOS flash the cards? That's usually the biggest factor for increasing HR.

Does it crash when you load the stock BIOS on it and run without any OC settings? Like just vanilla.

What's your total hashrate?

I would say solo mining is probably not as profitable with something like ETH, maybe a smaller cryptonote coin?

Honestly for RAM just go for the absolute cheapest. (within reason)

Definitely avoid any high performance RAM, the ones with heatsinks, etc.

I would recommend against solo mining unless you have a huge setup and can guarantee decently steady returns. Even then, a pool is designed to give you a stable amount of currency based on your hardware. Sure you may get extremely lucky a few times, but over time a pool is going to be worth it for the stability.

What temperature are your GPU's currently at? Anything below 65-ish should be fine.

Also.. agreed with randomduck, seems like it could be a bit costly, when the whole idea with mining is to get your ROI as quickly as possible.

It's always the connector, from my experience. They tend to be cheap and dangerous.

I switched out all my adaptors/connectors and use straight PSU to the riser, have never had a problem since.