Comment by rasz
> With the PSX... so-so. Yes, it could match maybe a Pentium 90 almost 100, but a MMX pentium with 3DFX would stomp it
Pentium much faster than MIPS CPU for game logic, 3dfx 50 MPixels/s fillrate matches Playstations 60 MPixels/s, Pentium FPU tho is no match for Playstation GTE 90-300K triangles per second meaning you would have to rely on CPU power alone for geometry processing (like contemporary Bleem) resulting in 166-233MHz Pentium minimum requirements. MMX would be of no help here, it was barely used in few games for audio effects.
Bleem it's an emulator; it emulates the architecture, is not a virtualizer. 233 MHZ to emulate the 33 MHZ PSX seems reasonable, Windows 95/98 take up a good chunk of the CPU themselves. But, you forgot something.
The PSX "GPU" just worked with integers and that's it. Any decent compiler such as GCC and flags like -ffast-math would emulate the both dead simple MIPS CPU and the fixed point GPU where no floats are used at all while taking tons of shortcuts. MMX? Ahem, MPEG decoding from videos. If you did things right you could even bypass the BIOS decodings and just call the OS MPEG decoding DLL's (as PPSSPP does with FFMPEG) and drop the emulation CPU usage to a halt and let your media player framework do the work for you.