Poor performance on a computer that should run dolphin fine?

[wowbcf]

I'm getting poor performance on a computer that should be able to run dolphin. It even runs minecraft at 50fps.

Specs of the computer in question:

Intel i3 - 4 cores @ 2.3GHz
HD 3000 graphics
4GB RAM

I get about 2-4 FPS in any given game with this setup, which is strange, because I get 25-30FPS with the following computer, with the exact same dolphin settings (native resolution, no fancy stuff turned on):

Intel i5 - 4 cores @ 800MHz (underclocked with power saving)
HD 4600 graphics (underclocked with power saving)

I don't see why something that's so much slower should be out performing it by so much, there's clearly something wrong somewhere.