I'm unable to select the GPU or Hybrid rendering option. The graphics card is an FX3700 which is apparently CUDA compatible (even if a bit dated), I've downloaded the latest graphics card drivers and CUDA version; however it doesn't seem to detect this latest CUDA update.
In the Render device window I get the following:
When I go into System info:
It clearly detects the CUDA device yet it still thinks its an old CUDA driver version even though I've downloaded 7.5.