How to access PC components directly, bypassing OS and other layers of abstraction?

Question

Operating Systems

How to communicate with cpu, gpu and other bypassing the OS, directly? Preferably in c, c++ or assembly. Or can't you bypass OS?

Answer 1

No way. One of the functions of the OS is not to allow this.

Answer 2

No way. This was possible only in DOS. Virusers loved it very much :) But you can write a driver and work in ring0. True, there is one awkward movement in it - and you are a father and you have a BSOD

Answer 3

write your Ring0 driver everything is allowed there.
However, you can look for known overflow holes in existing

Answer 4

Perhaps Vulkan, DirectX, OpenGL / CL, but it depends on the task, and then you won’t bypass the operating system, but you can more clearly distribute some tasks