Should have been a little more specific: what CPU do you have? Going by your mobo, it can be anything from an FX-4xxx to an FX-8xxx.
You're going to want to overclock your CPU if possible.
Unlike PC games, Dolphin relies more on the CPU than the GPU for processing, and a stronger GPU just means you can upscale the IR and AA/AF to higher resolutions.
Also, Dolphin only needs a computer to have 2 GB RAM to run. More doesn't do anything for it (but a 64-bit OS may need 4 GB to run properly).
The Metroid games are some of the more demanding games for Dolphin. I also think the default to LLE audio, which increases the CPU load more.
Try the latest dev build with a rewrite to the HLE audio that decreases the load a bit
You're going to want to overclock your CPU if possible.
Unlike PC games, Dolphin relies more on the CPU than the GPU for processing, and a stronger GPU just means you can upscale the IR and AA/AF to higher resolutions.
Also, Dolphin only needs a computer to have 2 GB RAM to run. More doesn't do anything for it (but a 64-bit OS may need 4 GB to run properly).
The Metroid games are some of the more demanding games for Dolphin. I also think the default to LLE audio, which increases the CPU load more.
Try the latest dev build with a rewrite to the HLE audio that decreases the load a bit