On my ch6 board corsair lpx 3200 2 x 8gb would only be stable at 2933. Settings made no difference. 3066 would boot but randomly revert back to 2133 after a few reboots. It was Hynix ram.
Stilts settings at 3466 c15 worked first time stable on ch6. Never reverts to 2133.
I believe The Stilt have timing guidelines for Hynix as well: