SMG 1 or 2 + LLE audio are some of the most CPU intensive scenarios for Dolphin. There's no getting around the fact that only heavily overclocked Intel CPUs (such as the 2500K, 3570K, etc) have been able to consistently maintain fullspeed with SMG1 or 2 under LLE audio. AMD's CPU don't have a high enough single-threaded IPC to do so. That's just the way AMD designs their microarchitecture; single-threaded performance isn't particularly emphasized.
Modern PC games tend to rely greatly on the GPU for most of their performance. Emulators, on the other hand, generally rely a lot on the CPU. You can find cases reversing the previous statements, but not usually.
Now, you can use what's called the "VBeam Trick" (google "dolphin emu VBeam trick" or something to that effect). The VBeam Speed hack in Dolphin under LLE audio may allow the audio at least to play fullspeed, even if the FPS is less than fullspeed. 50~54 FPS under LLE audio is quite playable imo, but that's subjective. It's better than nothing, however. A more desperate attempt at running SMG1 or 2 fullspeed under LLE audio would be to dump the PAL versions (which run at 50 FPS as their fullspeed frame rates). Sounds crazy (and it is) but cheaper than buying a new mobo + CPU.
Modern PC games tend to rely greatly on the GPU for most of their performance. Emulators, on the other hand, generally rely a lot on the CPU. You can find cases reversing the previous statements, but not usually.
Now, you can use what's called the "VBeam Trick" (google "dolphin emu VBeam trick" or something to that effect). The VBeam Speed hack in Dolphin under LLE audio may allow the audio at least to play fullspeed, even if the FPS is less than fullspeed. 50~54 FPS under LLE audio is quite playable imo, but that's subjective. It's better than nothing, however. A more desperate attempt at running SMG1 or 2 fullspeed under LLE audio would be to dump the PAL versions (which run at 50 FPS as their fullspeed frame rates). Sounds crazy (and it is) but cheaper than buying a new mobo + CPU.