I have a problem with throttling of the APU. For the last 1-2 days, it started to throttle to 20% of the GPU and about 75% of the CPU max performance after a brief gaming or other heavy loads.
The problem can be fixed by restarting the system, but it comes up after another brief gaming (5 min) or heavy load.
I found a similar problem described in the following Tom's Hardware review - AMD Raven Ridge Thermal/Power Analysis: Ryzen CPUs With Vega
Examples of the performance hit:
1.World of Warships with High settings - normally 50-70 FPS, when bugged -> 10-15 FPS
2. Heaven Benchmark Extreme - normally 10-15 FPS, when bugged -> 2-3 FPS
3. GTA 5 with High settings - normally 40-50 FPS, when bugged -> 10 FPS
4. Geekbench 4 CPU test: normally ~4250/12500 score, when bugged ~3000/10000
My system is the following:
CPU: Ryzen 5 2400g with the stock fan and no overclocking
Motherboard: ASUS TUF B350M-Plus Gaming with latest 3805 BIOS
RAM: 2x4GB Kingston Hyper 3000Mhz
SSD: Crucial MX500 500GB
P.S. - Previously, also had frame drops for 2-3 secs periodically. Now it just unplayable.
SOLUTION: WINDOWS reinstall resolved the throttling.
Occasional frame drops fixed by disabling CPU Turbo boost.