Your model has an i5-3210M (assuming you have the 2.5GHz model) which has a
maximum supported memory speed of 1600MHz. So anything higher than that might have problems - might not even boot on your model, or could be underclocked. Nonetheless it won't make much of an impact anyway, even if it would work.
As the graphics card is shared with the chip, your best bet to improve your graphics framerate would be to:
- Upgrade to 16GB RAM (2x8GB DDR3 1600MHz SODIMM) as this will increase VRAM size
- Upgrade to El Capitan (again increases VRAM size)