Such a slow way to gain bitcoins, but it would work I guess.
If you are attempting to mine with GPUs, do NOT mine bitcoins.
Actually, mine anything but bitcoins. Bitcoins would be, by far, the least profitable of any coin to mine.
You should actually be mining altcoins which have a value in Bitcoins and can be traded for bitcoins, but you can actually earn a substantial amount than you would if you were just mining Bitcoins.
For example, if you mine Bitcoins on GPU you are competing against ASIC users and getting literally no coins.
If you mine on GPU with other GPU users on newer coins, or coins that people still mine CPU On (like cryptonight algorithm, groestl, etc) you will make a lot more.
You just take the coin you mined, and turn it into Bitcoins. You will get a lot more than trying to just mine Bitcoins.
Check out www.whattomine.com and you will see the profitability after you test out each algorithm on your setup and see the speed.
If you want, follow me, and you will see in the next week I am posting many mining guides for users like yourself.
I will cover many topics, such as the profitability and how to really know which coin to mine with your setup.
It's very important because who wants to spend dollars and dollars in electricity, and only gain $.02 in coins? When you could maybe have earned the same amount as the power or even more if you were mining the right coin, even on older hardware. Trust me, it's possible.