Depends on what you call skyrocketing, but if it never went above 2 Ghz before you had something seriously wrong before. 5900 Product page    It has a base speed of 3 Ghz and should only drop below that if the system is idle and you have a power profile set under windows that allows the processor to go into a low power state. That same profile can be set with AWCC, so I am assuming you have recently played around with the power profiles in AWCC or windows.   However, it should be perfectly fine boosting up under load even under light load conditions.
I recently bought a brand new Aurora R10 Ryzen Edition. Recently have stumbled into a problem. When ever I boot up a game, the CPU ramps up to 4.0 frequency when it used to not go past 2. According to the AWCC, the system is not in an overclocking mode. I also have tried resetting the bios back to default with no effect. The default ram is 3200 MHz but in AWCC it says it's only running at around 2669 MHz. Anyone have a fix before I call tech support?
Aurora R10, overclocking, Ram running below frequency