See the Readme.txt file.

The highest value for the "-dcri" switch is 100.  Typically the miner uses 30 by default.

As others above have pointed out, you can adjust the intensity on the fly in either direction by using the (+) or (–) keys on your numpad.

The Asus board will work fine for your purposes so long as you're aware that despite there being 19 PCIe slots on the board, you will only be able to populate 13 of them with desktop/gaming GPUs (of either brand).

In order to use the last 6 slots you'll need to populate them with Nvidia P106 cards (I would also suggest you go to Asus' website and download the motherboard manual and read it before buying the board, just so you don't have any surprises).

Also, if you haven't already seen them, head over to the *Bits Be Trippin'* YouTube channel (https://www.youtube.com/channel/UCVVWXoQfMfQVuzxcLylq9aA) and watch their videos on building rigs with the Asus B250.

Don't get me wrong, the B250 is a great option since it will reduce the need to purchase 'two of everything' (RAM, CPU, SSD, etc) to build two rigs.  Just do it with your eyes wide open.  

Can also buy BTC or XMR (Monero) cloud mining hashrate from Minergate as well.

Minergate also has its own multi-coin mining software in either GUI or CLI form (available for Win32/Win64, MacOS X, Ubuntu 64bit & Fedora 64bit).

Roger, I think you're missing the point entirely of what ZetaOS is trying to say. 

He's not advising against buying mining contracts, he's saying that when buying contracts, consider both the ROI rewards (i.e. the cost of the contract vs the time it will take for you to get your investment back) and the difficulty factor (i.e. the time it will take to hash a block and earn a reward).  I dare say all ROI calculators base their results on current hash-rates and difficulty – for them, they can't predict where the hash difficulty of any coin will be two years from now, because you can't predict how much hash-power will be invested in any single mining effort or whether that hash-power gets reassigned to other less difficult and more 'profitable' coins.

At some point, the difficulty in Bitcoin mining will be such that even at 10k$ a coin, it will no longer be profitable to mine anymore because the difficulty has risen to the point that it then causes any future earnings to be entirely consumed by the liabilities (service & maintenance fees) expended to mine the coin.

—————

There is nothing inherently contradictory in both holding Bitcoin as a long-term investment (in the hopes that the price will continue to rise) and mining it (which only serves to increase your holdings in that investment).

YOU DA MAN! (or DA GAL!  )

Brilliant research!

A very hard and expensive lesson to learn. 

I hope you sat down with yourself and good face-to-face discussion on the value of research. 

There's a saying we have in the RCIC, "time spent on recce is never wasted."

To paraphrase that here in this case, "time spent on research is never wasted!"  Never forget that.

And as always: Caveat emptor!