> N64 was effectively Indy

Not really, no. The memory system and graphics systems are completely different, and the CPU is a different MIPS processor to one in any SGI desktop. Some devkits did involve having whole subsystems on expansions in Indys though.

It should say something that when the Indy was announced the quip was "It's an Indigo without the go" so even had the N64 been Indy based it would not have been noted for CPU performance.