Ok here are the results. I've had to stop a bit prematurely due to severe heat issues.
- So with Bitcoin and the XFX R7950 Ghost we've mined 0.0000952BTC or $0.075208 USD in 3 hours assuming one bitcoin is worth $789.15 USD.
However, this was with the graphics card running at 95C on average. This is and the extreme end of 'safe' for this particular graphics card and you wouldn't want to run it at this temperature 24 hours a day.
I switch the other pc over to litecoin to see what it was all about as well.
- So with Litecoin and the Gigabyte GTX650Ti it's earned 0.00013474LTC or $0.028281926 USD in about 1 hour assuming one litecoin is worth $20.99 USD.
This was processing about 127khash/s.
GPU temperature is around the 75C range. Hot but ok (within safe parameters).
Given as well that none of the blocks were completed that I could tell (a block is split amongst users to complete as doing it solo would take a bout 1 year for a solo user to complete) my work for today comes to a total of $0.00.
As a reference you can get dedicated bitcoin miners. Using ebay and getting 5 x 1600mh/s machines, you would pay $445 + electricity for a year and earn $307.50 per annum assuming one bit coin is worth $789.15 (today's rate). Even if the value of bitcoins doubled this year, your payout will still be marginal.
So Soulnet's conclusion is... don't waste your time :)