My computer specs meet the recommended and I'm unable to run almost any game without constant slowdown. I'm on Ubuntu 22.04, and am using lr-desmume, which is the libretro version that I can load through retropie. In the .sh file I tried setting desmume_JIT = 1, no change. On the standalone version perfomance is even worse. Usually, I get 50-60fps, with it hovering in the low to mid 50s, enough to slow it down and make it a bad experience. The output resolution has been set to the lowest possible, although I've gotten the same results regardless of the resolution, and since this emulator is so CPU heavy I'm sure it's a CPU issue. I know for a fact the CPU is not thermal throttling because I've repasted it and measured temps.

Any help is appreciated.

System specs:

i7 950 (4C/8T) @ 3.07 GHz
4GB DDR3 RAM @ 1066 MHz
RX 470 4GB