How does it feel to have a GPU twice as powerful as your CPU?
I bet you don't even reach 70% GPU load... ever.
Only minecraft with shaders.
It's awful. But it's only temporary. See my post above.
Weakest computer I have (in the attic) has an Intel CPU that runs at a "Breathtaking 600MHz for a fast and responsive system!" according to the sticker on the front. With a whopping 256MB of RAM and onboard graphics.
Then I have one with an Intel Celeron 1.6GHz processor with 2GB of RAM and an 8400 GS GPU.