On version 4.0 everything is great, minus the speed the games run at. If I try versions lower than 4.0, I also experience bugs like the background music disappearing and some polygon glitches. I tried checking some tutorials online to see if I could fix it by better configuring the emulator, but apparently everything is fine and up to date.
I am trying to run a number of different GameCube games on both the 3.0 and 4.0 versions of Dolphin and they are extremely slow, taking dives to as low as less than 10 FPS at most times. I seemingly have two AMD Turion II P540 Dual-Core Processors. My video card is ATI Mobility Radeon HD 4200 Series, from AMD. I am running versions 3.0 and 4.0 on a notebook I bought in 2010 with Windows 7 - 32 bits, 3GB of RAM.
I just got into Dolphin and it's been awhile since I last fiddled with emulators.