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Good to know, thanks.

i have question about PCSX2 and how it use instructions :

other plugins ( SPU2-X ) do they use instructions ?

and can i manually chose the instruction

why can't GSDX chose the right instruction ( highest available ) automatically ( but because of somehow exprimental AVX instruction this may cause problems )
if not and why not to make ( like AVX instruction we need to discuss this more often ) the unsupported instruction cannot be chosen in plugin/BIOS selector

I don't see any performance difference between 3 instruction set mode. Perhaps it is too small to be noticable.

(08-31-2011, 11:30 PM)Polantaris Wrote: [ -> ]IE, is SSE2 the slowest, SSSE3 the middle and SSE4.1 the fastest, or vice versa?

Not quite, while "the bigger number, the better/faster" applies this depends on the game and scene playing. Most of the time the difference between SSSE3 and SSE2 is minimal, SSE4.1 can be a bigger impact but still depends a lot on the game and scene you're trying.

SPU2-X uses SSE2.
My guess for GSDX is since the speedup from using S3E3+ is so small using runtime checks would just make it slower.