SnowMare :
n0ns3ns3 :
yes it can and it does.
you just need to realize that the increase is somewhat proportional to OC.
it means you have increased the clock form 1306 to 1340 = ~2.5% and thus your FPS can at most increase by ~2.5%. 2% of 60FPS is 1.5 FPS.
how much can i oc my rx480 4gb by before it begins to fry
Not applicable.
The GPU fans ramp up, and the frequency of the GPU also drops as it overheats to prevent damage.
Overclocking sometimes does NOTHING at all if a game is already starting to hit the throttle point (varies by the game).
You should Google some RX-480 overclocking guides though it's likely getting much more than 6% is unlikely, or jumping from 50FPS to 53FPS which is hard to tell unless you have a repeatable benchmark.
Your CPU also matters. If it's relatively weak you may already be bottlenecked by it.
So...
1) find OC guide
2) Investigate WATTMAN tweaking (frequency/voltage optimization). There may be a tool that can figure this out automatically by stressing the card at each major frequency and then adjusting the voltage.
Lower voltage means less heat, thus less chance of throttling frequency.
3) TWEAK THE GAME.
This is where you'll achieve the most benefit. You may want to aim for a solid 60FPS most of the time. I don't think AMD has this in their control panel, but you can try forcing "DYNAMIC VSYNC" using RadeonPro. Then tweak settings to achieve a solid 60FPS with occasional dips.
With VSYNC you'll not have screen tear. You never want VSYNC ON if you can't maintain it (60FPS on 60Hz monitor) because that causes stutter. With Dynamic VSYNC ON the software turns VSYNC OFF automatically so you get screen tear instead of stuttering.
4) AMD's new tool (forget name):
AMD has a tool now which drops the FPS if there's less user INPUT. Mostly beneficial for laptops I guess, but they said it can help a bit for desktop too because the temperature drops as the FPS drops. It can take a little while for the case temperature to raise.
Not sure how useful that is but you can try it. It's shown HERE:
https://www.pcper.com/news/Graphics-Cards/AMD-Releases-Radeon-Software-Crimson-ReLive-16122