First you should decide which coin you want to mine. After that it will not be hard to find out which software you need for that coin, because not every coin could be mined with every software. When you find software, commonly with mining program comes readme file where you can find every command you need to know. Other than that, just search true this forum. It won't be that hard to find out all you want to know.

Know that you need to do research for yourself , don't expect others to do that job for you.

This sounds really nice, and I guess this token could be my next investment. It would be wise to research a bit more, but from what I have seen its serious project and I guess it have potential.
But honestly I'm not sure for how long this will go on. New ICO joins crypto world almost every day, there are just too many of them. And what makes me even more amazed, its the numbers of invested money.
Thanks for this information, post again if you find other things about this project.

Similar thing happened to me, but luckily I have seen the damage on my PSU cabal before it has started the fire. What went wrong for me was that, I put too many GPU's on one PSU. Because of that, there was too much stress on PSU's wires, which lead to damaging of wires. Maybe you have same problem. Maybe your PSU is not strong enough to support those 12 GPU's that you have.

What you said when price of bitcoin was $20k, was pure speculation. It would be same if I said "one day we will have unicorns (horses with one horn)".

This time it is different, market for cryptos are much much bigger. Every day more and more people are joining crypto world. I believe that 2014. could not repeat, because things are not the same.
But what I said doesn't prove that fall of bitcoin is not possible. I believe that this will pass, and Bitcoin will continue its path. And even if Bitcoin doesn't survive this, there will be some other crypto to succeed it.

You are correct, good projects will suffer from this outcome. But look it from their side. They can't know which project is scam and which isn't. In sea of ICO's and scam projects it would be nearly impossible to find and root out scamming ones. So in this case simplest way is most effective, and that is: ban all of them. I believe that in time that will change, but till than this is best course of action I guess.

There is nothing to correct, I said that from specifications we can see that this MB support 12 cards, but that my friend at the moment have only 5 on it. Read my post again and you will see what I speak of.

Also after checking price and thinking about it, I think this MB would be good choice. At the end I think it would be money worth paying for MB that can support 12 GPU's.

Crazy friend of mine bought it, and so far he has put up to 5 cards. But as I could see from the specifications, this MB could support up to 12 cards. I guess that is one hell of a MB for mining.
But why did I said crazy friend? Well because there are some old MB which could be bought for really low prices, which could support multiple cards at once. But they can't run 12 cards at once so...

Dropping out those adds was smart thing if you ask me, because Facebook's and Google's reputation was on stake. Those adds would hurt people by scamming them, and those people would blame this companies. So I guess it was right thing to do, to ban all those adds. Also I think that this ban is only for limited time, at least until crypto is regulated fully. Big companies hate passing good deals that could bring them more money.

At the moment investing into GPU's for mining is expensive thing. Also with everything that is going on (price drop and rise of difficulty), getting your investment money back through mining would take really long time. But I agree with you, high end cards would always be better choice. Unlike ASIC miners, GPU's will always be easier to sell and thus return some portion of your investment. Selling GPU's is easier simply because more people uses them, and because of that market is bigger. There are some properties that GPU's have which ASIC miners don't.

"Or 1080 gtx  is  better" , better than what? What are you talking about, your post has nothing to do with OP's question. Read posts before you try to answer some, and stop shitposting please. Also start reading your posts before you post them.

Similar thing happened to my friend when he started mining Ethereum. Two of his cards had lower hash rate than other. We didn't do anything to fix it at the start, and now everything is working just fine. Maybe its because he is using 9.5 claymore now, or it could be that it was just some kind of bad info. How long have you been mining, for how long do you have this problem?

You say that sometime miner works perfectly with 5 GPU's, and at the start of OP you say that you mine with 6 GPU's. If everything works fine with 5 GPU's, maybe that 1 extra GPU is making problem (if its always the same one). I would suggest for you to try out every GPU and see which one is problematic. If that is not the case, and all GPU's work just fine, than its either software of its CPU like CryptoWatcher420 says. If its software than consider contacting Nicehash support, maybe they can help. Other than that, I guess we can not do much without more details.

I see that most of people use cvddc and mvddc in range of 850-950. Some people even say that there is no big difference between 850 and 900. Maybe it would be wise to stay on 900, but also you could give it a try and go for 950 and see the difference yourself.

I think there is truth in what you say, and I agree that a lot of people say bad things about bitcoin just to lower price even more. But I guess that is only natural, things like that will always exist in economic sphere. People will use other's fear for personal benefit, and that is happening now. People should start thinking with their own head, and stop being fooled by wrong or unreliable information.

Try the same thing with older version of Claymore. I had some problems with multiple GPU's before, not sure if it was same as yours, also I have Nvidia cards. But I guess it doesn't hurt to try that out. If that doesn't help, try to run Claymore without extra changes in bat file (as cleaner as possible).

I agree with you that Nicehash is more profitable at the moment. From my calculations I can earn more with it, around 30+ dollars worth in Bitcoins from Nicehash, than from mining Ethereum only. Nicehash is cloud mining tool not a coin, and OP asked for profitable "coin" that is why I put Ethereum on first place.  But if OP is interested in something like that he can check it out. It is good for people that don't have high capacity mining rigs.

EDIT: If Ethereum really enter PoS after 2018. , it would be wise to have some ETH in your wallet, just in case of price rise 

There is truth in what you say. Sometime risk pays out, but I doubt that is the case for CPU mining.

There has been some news about ASIC miners for other crypto beside bitcoin. Ethereum was in first place among those crypto. If that really happen and those companies make ASIC miners for other crypto, I guess that would affect price of graphic cards and make them fall down a bit. But even if prices drop a bit, they would still be really high.

I doubt that is the case. Yes, mining programs have changed, but I guess that some things can not be done simply by changing software. CPU's have drastically lower hash rate than ASIC miners or GPU. We can assume that if CPU mining was profitable more people would do it.

That was expected to happen in near future. I guess it is good also, because it will bring down prices of GPU's, gamers will be happy about that.
But honestly, I am not sure what to think about Ethereum ASIC miners. If Ethereum becomes PoS, I don't see reason why someone would buy those miners. It would mean capturing their investment... but I guess that would also depend on Miners price on start.

Even if you have free electricity, and have 20 CPU's sitting, my honest advice to you would be to stay away from mining. Better sell those CPU's , you would earn more money. But I can understand you. CPU's mining died, but if I need to guess which coin would be good for mining I guess monero would be my answer.