Regardless all costs
How many bitcoins can be made at this time in 1 month with 100ghz cpu?
Looks like you have quite the botnet there

Pretty sure he mistook gigahash and gigahertz.
Gigahertz is CPU processing power, while gigahash is mining power.
Yes I ment the computer power like 100 gigaretz. How to count gigahash?
You'll need to run miners on those PC and see how many megahash they get.
where can I see megahash info while miner is running?
Just look for the amount displayed on the miner itself? It's not rocket science. What miner are you using?
I had guiminer but it doesnt open anymone, idk why.
Can u recommend any good miner?
btw do RAM, Internet connection or ghz have any influence on how much gigahash or megahash PC has?