Hi, I have a Gigabyte G1 Gaming GTX 970 and I was thinking to possibly overclock this card, but I want to know if their warranty covers overclocking the chip or the vram or both or none. I couldn't find the warranty information so thats why i came here to ask. One more thing, it's kinda off topic, but what does over the vram even do; does it improve gaming performance in any way at all? Thanks, I'm looking forward to yours reponses!