what is CUDA version ?

[igotek]

I have installed 387.71 NVIDIA drivers. I want to use KlausT ccminer fork. There are two different version:

ccminer-820-cuda8-x64.zip
ccminer-820-cuda91-x64.zip

I didnt installed CUDA. Should I install CUDA before use these miners ?

What is the important thing about CUDA version ?

The mining starts without CUDA installation. Please tell me whats CUDA for.

[Schleicher]

You only need the driver, then it should work.
When you have an old driver then maybe the CUDA 9.1 version doesn't work.

[fapar]

I have installed 387.71 NVIDIA drivers. I want to use KlausT ccminer fork. There are two different version:

ccminer-820-cuda8-x64.zip
ccminer-820-cuda91-x64.zip

I didnt installed CUDA. Should I install CUDA before use these miners ?

What is the important thing about CUDA version ?

The mining starts without CUDA installation. Please tell me whats CUDA for.

CUDA increases the computational performance of the graphics adapter NVIDIA. Different CUDA versions support different generations of NVIDIA cards.
Example https://en.wikipedia.org/wiki/CUDA