OK, I had time to run Cinebench R20 on the FX-6300. CPU score is 875 cb, CPU (single core) is 207 cb, with an MP ratio of 4.23x. That's... not great. At first glance the 4.23x MP ratio doesn't look very good, until you remember that Cinebench considers an FX 6300 to be a three core CPU with six logical cores. Between scheduling code that's probably optimized for conventional SMT designs and various resource contention issues affecting the construction core designs, 4.23x looks a little better. That doesn't change the fact that it falls behind a midrange Ivy Bridge i5, mind you.
edit: Alright, ran it on the 7940x... and I'm a little disappointed. CPU score is 5230 cb, CPU (single core) is 239 cb, with an MP ratio of 21.87x. It's running at stock, but that's well short of their listed numbers for a Threadripper 1950x. I have a feeling I've got some fine tuning to do, or that my AVX offset is configured too conservatively.
edit the second: Disabled the AVX and AVX-512 offsets and re-ran; the CPU score nudged up to 5282 cb, but CPU (single core) leaped from 239 to 438, with a new MP ratio of 12.06x. Looks like I've got more digging to do.
Work: Core i9 7940x, 32 gigs RAM, RX Vega 56 + GTX Titan Xm, Win10 Pro + Xubuntu 18.04
Media: Ryzen 7 1700, 16 gigs RAM, Radeon R9 Fury, Win10 Pro
Tinker: Xeon E5-4640, 32 gigs ECC RAM, GTX 750 Ti, Slackware 14.2
Read me at https://www.wallabyjones.com/