First of all: read the Sticky posts before posting here.
They are on top and should be read first.
We are answering the same questions about
twice a week here.
You should _not_ install the driver by hand.
In your Xorg.conf you are using
which is the open nvidia driver without any acceleration.
So: follow the instructions given abouve, read the README,
edit your xorg.conf accordingly. If it still doens't work:
read the other sticky thread on how to report problems
and act accordingly.