No - GPU (I think?). Have two workers; one using GeForce 9400 and one using GeForce 9600 according to the GUIMiner info I'm seeing.
I'm no computer geek and frankly, don't even understand the whole bitcoin concept so am asking forgiveness in advance if I say anything too stupid.
even if you would use the best NVidia card on market now, you wouldn't make anything , it even may not pay for the mining costs and i am saying even if it is a GTX690 , Nvidia = loss of time and energy . ATI is much much better, but hey you did miss the train anyways , GPU mining is almost dead , Diff. factor just raised today about 38% and it will raise again after 2 weeks or less , and even with the Best ATI GPU you wont make any profit, ASIC Owners will be the new leaders of BTC mining ... so if you dont have ASIC just sit and watch, and just to tell you even if you are thinking about ordering an ASIC... bad news my friend too late ... do the math and you will understand why I'm no computer geek and frankly, don't even understand the whole bitcoin concept so am asking forgiveness in advance if I say anything too stupid.