The Allwinner H3 is a quad-core OTT Box processor that provides high-performance processing and a high level of feature integration. CPU chip repair for Whatsminer M20 M21S control board. 

It's rated to run at 1.296GHz, anything higher is an overclock (usually overvoltage). If you run it without a heatsink, fan, and proper dvfs settings, it may overheat.

H3 provides almost full-motion playback of up to 1080P high-definition video, supports 4K@30fps H.265 decoder, and supports OpenGL ES 2.0.