I have a Nvidia Geforce GT 650T version 369.09 with 4Go memory, i want to try mining ethereum using a Cuda based miner, i've read that geth and eth didn't support cuda so is there any fork or another miner to use it? Thank you
Genoil's ethminer is what you're looking for. CUDA mining with some nice extra features.
I'm currently on a machine equipped with an Nvidia GTX950 and I'm GPU mining via the command
$ ethminer -G
To install it you have to install cpp-ethereum, here are the steps under ubuntu 16.04:
sudo apt-get install software-properties-common sudo add-apt-repository ppa:ethereum/ethereum sudo apt-get update sudo apt-get install cpp-ethereum
or directly via github: cpp-ethereum on github