I can assure you, it's not the amount of memory that's on the graphics card.
You probably upgraded to a card with a better GPU clock.
The amount of memory on your graphics card has little to do with the card's performance.
It really has to do more with resolution, which, of course, has a lot to do with in eyefinity (3 screens)
OK, I'll amend my statement. He has a shitty card and still gets around 60 FPS.
And yes, I upgraded in nearly every possible way. It's even prettier than my last card. (I also finally put my screen in native resolution after I upgraded. /fail on my part)