Been getting really unexpected slowdowns...

[Pyrota]

I just downloaded Dolphin rather recently and I've been getting odd slowdown that I didn't expect from my hardware, on any graphical setting. For example, in Fire Emblem: Path of Radiance, I'll have 55-50 FPS when zoomed out (once) on a map, and it drops to about 45 or lower if I'm moving around while zoomed out. However, this problem persists on every AA setting and IR setting across multiple games (Zelda: Wind Waker, when spinning the camera or moving around, Mario Kart Double Dash, etc...)

My specs are:

OS: Windows 7 Professional (64-bit)
CPU: Intel i7 950 (3.07GHz)
GPU: AMD Radeon 6970 (1GB)
RAM: 6GB
Current Revision: 3.0-458

Any help would be greatly appreciated.