Dolphin is making me confused

[chulle]

hello guys, i am new here, so please forgive me if i missed subforum or something like that.
So i found DragonBall z Budokai T. 3 and downloaded Dolphin 3.5, but when i started to play it was kinda slow. Full of glitches, and lag, intro song where dragonballs are fallin` on Earth was like someone chopped it with an axe, and when i fought it was with low FPS.
So i thought i have slow PC or something like that, and tried to find a way to increse lag...but, suddenly while i was in fight with freeza game suddenly got SUPER fast, like 120% fast, and lag was 60, but then it fell again...
So i`m thinkin` if it could be that fast, it can`t be my pc...

here are my specs, and i will wait for your advice
[color=#0000ff] [/color][color=#0000ff]Intel® Core™ i3-2330M CPU @ 2.20GHz
[/color]RAM: 4.1 GB
OS: [color=#0000ff]Microsoft Windows 7 Ultimate Edition (build 7600), 64-bit
Video Card: [/color] [color=#0000ff]GeForce GT 520M with Video RAM 2,7 GB and Pixel and Vertex shader version 5.0[/color]
so, what is your opinion?

[LordVador]

Your CPU is a bit weak. Above all for this game

[chulle]

Your CPU is a bit weak. Above all for this game

so there is no tip to do to make it playable even with low graph?

[DefenderX]

Exactly.

But... you could gain some FPS more with the settings for best speed (link in my sig). Anyway, I won't help much.