The PC you have there has a RADEON HD 7950, ideal for GPU mining. In ideal circumstances, you should get a hashrate of 510 Mhash/s, maybe 600 Mhash/s when overclocked (but I don't recommend this). This should get you something between 21 and 23 PPCoins per day (almost 1 coin per hour).
Current share values at coinotron: PPS: 0.01419151, RBPPS: 0.01580419
However, don't forget that the PPS (pay per share) at coinotron has a (temporary) 12% fee, but you will get your coins, even when the block is orphaned (failed to mine a block).
The RBPPS as a 2% fee, but you won't get paid if the block becomes an orphan.
If you set up GUIMiner, it should look like this:
https://i.imgur.com/UZDyvVV.png
Username and password are the name and password of the worker you create at http://coinotron.com
You can use this site (http://dustcoin.com/mining) if you want to compare with other coins or if you want to calculate profitability.
If you liked my answer: PPC: PMv9vZdEjvFfipsTiMWYZRvCNucDoLm4EM
Good luck!
