AMD RX 480 Clock speed is varying continously

[Saud6700]

While idling, there no GPU Activity and the clock speed remains at 300MHz.

During browsing, the GPU Activity shows spikes and so does the clock speed. The Clock Speed is spiking even when there's no GPU Activity. Should I be worried?

BTW, under 100% load, the Clock speed maintains a constant 1306MHz (The boost clock freq of Sapphire Nitro+ RX 480).

While Playing Resident Evil 6 Biohazard:

While Playing Far Cry Primal:

 

[CelicaGT]

Normal, web browsing uses your GPU for some things, lightly. GPU clock will jump from time to time.

 

[Saud6700]

Normal, web browsing uses your GPU for some things, lightly. GPU clock will jump from time to time.

Ah.. thanks. That's a relief.
Is the Temp Okay? I've set the fan speed to AUTO. Should I be tweaking it to lower the Temp?

 

[CelicaGT]

Nah, those temps are fine. You can set up a custom profile if you want but I wouldn't bother.

 

[Saud6700]

Nah, those temps are fine. You can set up a custom profile if you want but I wouldn't bother.

Today, while playing Resident Evil 6, the GPU activity pattern was unusual. It was like:

After playing for 15-20 mins, it started stuttering. I think it was due to the drop in memory clock (circled in yellow in the pic). Just to be sure, I restarted the game and after 15-20 mins, it stuttered again. This time, I had MSI afterburner running in the background to monitor temps and wattage.

1. Why is the GPU usage pattern so weird?
2. Why is my memory clock speed dropping suddenly?
3. What's causing the stutters?

UPDATE:
I also played Far Cry Primal today. There was no stuttering this time, but the GPU activity showed spiking.

 

[CelicaGT]

Hmmm, I would check 3 things, CPU utilization, temperature and clockspeed. You are looking for any signs that it is throttling which could be the culprit here. I'm kind of skeptical that it's the cause due to the rhythmic pattern but it's the best place to start. Also list your full system specs so we can see if there are any other potential issues.