The performance of the processor has dropped since the drivers for the video card were updated, what could be the problem?

Question

Windows

There is a PC, the configuration is like this -
windows 10 1809 professional
athlon 200ge
8gb RAM
Video card RX 550 4gb powerColor
PSU chieftec apb-400b8
SSD goodram cx400
The temperature of the entire system does not exceed 40 degrees, since the driver update for the video card, namely adrenalin 21.4.1 sharply processor performance dropped, despite the fact that the system is clean, turned off HPET, spectre, meltdown. the power plan is set correctly, the power supply was checked on such software - furMark, occt. 12 volt drawdown lines are within the acceptable range, namely 11.9 at 100% load on everything, and 12.1 at 100% processor load, noticeable stutters in games, low fps when rendering geometry and CPU load.
rolled back drivers.

Answer 1

Have you installed the latest Windows update? KB5001330