Dolphin Graphics card requirements

[Lumbeeslayer]

Requirements to run 4x internal resolution with 9xSSAA twilight princess wii is super slow 10fps for me my gosh my thought to be enough video card that can handle crysis 2 maxed out but not dolphin 4x on 9xSSAA which is 6x internal resolution i think.
My graphics card is HIS RADEON HD 7850 1000mhz core clock 1200mhz mem clock
My CPU is AMD Phenom II 960T 4.3GHZ
MY ram IS 8gb 1600mhz

I can run zelda on 4x internal resolution 30fps but not combine with 9xSSAA.

So what are the graphics card requirements for 4x internal resolution with 9xSSAA