I use the Phoenix Rising 1.3 GUI, and I'm mining two cards.  Both phoenix.exe processes in Task Manager are showing 25% CPU usage.  I don't have the greatest cooling system on my Q6600 so it runs hot under 50% constant load.  I don't think that GPU mining would use much CPU at all.  Is it possible that jedi95 is getting some free mining out of everyone using his client?

worked, thanks

I had an 8800GTS in this PC before the 5830.  I first put the 5830 next to the 8800 in the case, assuming it would work.  It performed all normal operations fine, displaying my second monitor with no problems.  I installed the drivers and SDK, but when I would try to open phoenix or guiminer they would forcequit.  I did some research and found that cards of different chipsets don't get along in Windows 7 (weird).  So I took out the 8800, which had been mining successfully until I put the 5830 in, and removed all the nVidia drivers.

notes: computer restarts were done between all driver/hardware changes

I re-installed the APP SDK and latest drivers for my 5830 just to be sure, then tried guiminer again.  I got the message "No OpenCL devices were found," and that is where I am now.  I should mention that when guiminer was forcequitting when both cards were hooked up, it did not display an error message.  I'm sure a real solution exists besides reinstalling windows, which I am hesitant to do because this is my main computer.

thanks,
Niko