I think you wil get the highest fps boost after overclocking your CPU, your graphic card is good enough for Dolphin, also Ram seems ok.
When it comes to MSAA and AF i cant see a signifcant raise in fps on my system (C2D 3 ghz, 3 GB ram and a 8800 GT with 1 Gb Dram) so better keep it on for better visuals.
As mentioned above, try to overclock yor CPU, maybe you need to upgrade your CPU Cooler but thats not a big deal, search the web for a good one for overclocking you can get alot more mhz out of your CPU, mine was 2,4 ghz originaly and i colud do a little more with my current cooler (it´s an Air Cooler no Water Cooling) but i like it more quiet
But back to your Game, what is it you are trying to play?
When it comes to MSAA and AF i cant see a signifcant raise in fps on my system (C2D 3 ghz, 3 GB ram and a 8800 GT with 1 Gb Dram) so better keep it on for better visuals.
As mentioned above, try to overclock yor CPU, maybe you need to upgrade your CPU Cooler but thats not a big deal, search the web for a good one for overclocking you can get alot more mhz out of your CPU, mine was 2,4 ghz originaly and i colud do a little more with my current cooler (it´s an Air Cooler no Water Cooling) but i like it more quiet
But back to your Game, what is it you are trying to play?