If you only use the ingame key bindings, the pad will just stop working after a few seconds. In order to use the POV pad of the joystick for the cockpit view, follow these steps
During the alpha stage, Planetside 2 featured special particle effects powered by PhysX. These effects were removed prior to the official launch, but an option to disable PhysX was not available in the settings menu. The following fix forces PhysX off. This won't solve having a low-end machine, but will improve frame rate by 20% to 40% in most cases.
Theres a way to tweak render limits to even lower sizes than 500. If you play as infantry 300 is still playable and is a lot faster.
Use of SweetFX is officially listed as a banned client modification.