Granted, I seriously doubt an FX-9590 or any of the FX-8000 series CPUs will present any problems. However, I’m very keen on testing those Athlon X4s.
AMD’s suggested VR-Ready CPUs
The FX-8320 is absent from this list, and my guess is that’s because it has a base clock of 3.5GHz. All of the above CPUs have a base clock of 3.9GHz or better.