Don't use 4.0.2. It's slower than the latest development builds and the latest builds better handle timestretching the audio whenever slowdowns do occur.
You never said which games you're trying to play, but your hardware is relatively weak for some games in Dolphin, namely your CPU is the bottleneck most likely. Even at 3.2GHz, you don't have the required single-threaded IPC (which Dolphin relies on greatly) to run certain games at fullspeed. Intel is ahead of AMD by miles in this regard (benchmarks based on Dolphin prove this). Dolphin is chiefly a dual-core program as well.
You can 1) play not so demanding games, 2) OC your CPU, or 3) get new hardware. Before you do any of these, please check out the latest development builds like I suggested. 4.0.2 is stable, but slow. The development builds are safe enough (and worth it) to use in place of the stable build for many of our users.
You never said which games you're trying to play, but your hardware is relatively weak for some games in Dolphin, namely your CPU is the bottleneck most likely. Even at 3.2GHz, you don't have the required single-threaded IPC (which Dolphin relies on greatly) to run certain games at fullspeed. Intel is ahead of AMD by miles in this regard (benchmarks based on Dolphin prove this). Dolphin is chiefly a dual-core program as well.
You can 1) play not so demanding games, 2) OC your CPU, or 3) get new hardware. Before you do any of these, please check out the latest development builds like I suggested. 4.0.2 is stable, but slow. The development builds are safe enough (and worth it) to use in place of the stable build for many of our users.