The information sites say that the Ryzen 3 4300U has 512kb cache of the first level, but I cannot find this information on the AMD site. And no one answers me from info@amd.com. Tell me what is the size of the first level cache?
This website is reliable concerning processor information: https://www.cpu-world.com/CPUs/Zen/AMD-Ryzen%203%20Mobile%204300U.html
At AMD page for that processor: https://www.amd.com/en/products/apu/amd-ryzen-3-4300u
The Ryzen mobile processor has 4 cores thus 2MB/4 = 512KB per L2 Cache.