I have this processor and i also had some stability issues when i installed it. Did you tune your bios setting? The stock setting are usually not good for this processor. You have to set the cpu the same way as a 8350 that is overclock to 4.7Ghz. Boost the voltage, CPU Load Line, etc. Took me a while but i got my Fx-9590 to be full stable for 24h on prime95 at 4.7Ghz no turbo boost on a 360mm aio kit. Since then i have no more crash on wake up or when i game.
Be sure to look at the right cpu temps and the VRM temps. these should not get pass 65-70 degrees celcius under heavy loa