UC Berkeley has had functional RISC-V silicon for years now as research devices. RISC-V hasn't really been a thing outside of their architecture research group

UC Berkeley has had functional RISC-V silicon for years now as research devices. RISC-V hasn't really been a thing outside of their architecture research group for more than a few years now. The UCB-BAR also has some fairly decent RISC-V cores (BOOM and Rocket) available as open source RTL.