What's kind of neat is that you can put a downright silly amount of MIPS cores on something. Octeon, for example, with like 48 cores:
Most of a modern x86_64 chip is cache, and other System On Chip components (memory controller, PCIe controller, built in GPU), not necessarily what in the 80's and 90's we'd call the CPU.
I found more MIPS arch chips reading the open cores site than I ever did googling. Shame too, when there's fantastic hardware like this out there.