Performance Issues

[Shokun]

It's most definitely your graphics card. Although you say your machine meets the minimum requirements, GT420 is definitely a lot worse than GTX460. I'm pretty sure any graphics card with a price tag of over 100$ will get you a better one. Looking at your other setup, you seem to have top-notch CPU and 12 gigs of RAM, so can buy about the best graphics card on the market before other parts start to hold it back (depends on software used too).

If you need suggestions what to get, Radeon 7950 or Geforce 670 or better would fit your setup well, but of course depending on your budget (those cards are both ~400$ and considered high-end) you might want to consider cheaper card or buying radeon 6000 or geforce 500 series card. You get very good cards for around 200$, though you still might experience that graphics card is limiting the performance of your pc. Or if you have the money, feel free to go for the best there is (R7970/7990, G680/690), I doubt it would be an overkill. Also, that machine should be a very good gaming machine for years to come after that without any need for upgrades.

As for waiting until 2.0, there's no point waiting (unless someone has more info about new gfx models coming around that time) as your current card, apologies for my language, sucks for gaming and is way behind the other system, it makes no sense to have such an old and low-end card (it was considered low-end even at launch years back) in otherwise awesome setup.