Discrete vs. Integrated in 3DMark
Meaningful memory bandwidth and GFLOPS advantage give the GK208-based GT 640 a 10 per cent lead over the GK107 version, notwithstanding its wider 128-bit memory bus.
Feed those numbers into the Futuremark charts and the new GT 640 is very competitive against the Radeon HD 7730, and way, way better than most integrated graphics.