They are separate and distinct from each other. There will be no problem.
If the VRAM and system RAM have to match each other then a lot of gamers will be having lots of problems because most mainstream and higher performing cards have DDR5 VRAM. Motherboards only use up to DDR3 RAM. DDR4 is not expected to be released until 2015. Forget about DDR5 for motherboards...
*Salute* thank you for the answer and so fast also