Depends on your skill level.
Do you have a FreeSync monitor?
I think tweaking in AMD WattMan is very beneficial in reducing temps/noise as well as keeping clock frequencies from potentially throttling back (you can check this using GPUz or similar monitoring software while putting the GPU under a load like FurMark or 3DMark.
Here's an Undervolting Guide I put together for WattMan. You generally get ~30W power reduction doing this. I can help with additional questions (after you read that guide).
As an FYI, here's some points along the core frequency curve that I've generally found stable for most cards.
1000MHz = 890mV
1100MHz = 910mV
1200MHz = 940mV (this 940mV is typically an inflection point on the curve, it gets steeper above this value. Notice that values below this are ~25mV/100MHz and values above are 100mV/100MHz)
1300MHz = 1030mV
1400MHz = 1150mV