Miep might (I work occasionally on it so don't hold your breath) become an SGI Indy emulator capable of running IRIX.
Currently it emulates somewhat 64 bit MIPS CPU, and a bit of the Indy specific hardware. It can boot the Indy PROM upto the point where it wants to do DMA because that is not implemented yet.
On my laptop with an "i7-3630QM CPU @ 2.40GHz" it can do 38 million instructions per second. If I'm right that's about 190MHz (assuming 5 cycles per second on average).
My Raspberry Pi model B (running at 700MHz) does 2.75 million instructions per second.