Well not really, i play a lot, have 6gb of ram, but usage never did go more than 3.5 gb /
You are fine for gaming with 4 gb/ no matter what card. Normally better cards have higher vrams, wont use more of system ram than lower ones.
Well, considering I'm on 32-bit, I only have 3.2GB of RAM available. Also, don't GPU's with higher vRAM use more system RAM? This article
basically confirms that I need more RAM, but I was just wondering what some of you might think.