Graphics problem, constant little freezes/jumps? AMD Radeon RX480

Hi, yesterday i installed the new AMD Video driver and since then, my game constantly freezes every 3-4 seconds for about 0.1second...same with Apex legends for example. i tried to reinstall the driver, the optional one, current one, windows updates, used another port on my RX480, plugged off my 2nd screen. nothing seems to help. can you? The radeon settings seem to be broken anyways, because i can´t update it in the menu itself, only manually. it asks, "want to install", i proceed, it asks for permission. nothing.
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