So i just got my gtx 970 ssc "(i know the 1060 just came out but i bought the 970 about 20 days ago and had to RMA the first one) and ive been monitoring my vram usage, should i worry about going over 3gb of usage or does it not matter if i go up to the 4gb? I know the last 512mb or whatever is not that good, but should i still go past that limit?