it also works with the R2E. Ground was able to increase the bclk from 283 maxed out on air to 292 @LN2 on his new untested board.
https://hwbot.org/submission/5459890_
The big problem that still exists is finding a CPU that can handle a BCLK of +300. My CPU seems to max out at 299.1. Even with the A-OC I couldn't overcome this limit yesterday. very frustrating!!