You are running a C2D cpu so in theory you are running 100% of your CPU, if you look at your performance in your task manager it show that you are using 75% of one core and 25% of the other, in turn using 100% of your CPU. However, this is a virtual dual core processor, and in theory "so to speak" you have 200% of your CPU available. Think of it this way, you have 2 cores, each core is 100%. Hope this makes sense. [email protected] clients are designed to use the idle processes of your rig. Not to bog them down and run at full bore 24/7.