New to PC Gaming. Tips?

The HD 6570 is NOT a gaming video card. I'm guessing that the guys at the store where you bought this told you that it would work well... Unfortunately the truth is that you will need to buy a new video card.

For 1920x1080 I'd look at the HD 6850. Of course you could get a better video card but I suspect that your PSU has at most 1 PCI-E connector which really limits your options.

you've got a good system there, strange that they've put an under powered graphics in, deffinatley up grade that as sugeested above, your power supply seems a little under whelming aswell but it should run an ATI HD 6850 without a problem.

MSI are a good brand, they support overclocking and tend to be a little cheaper than the competition and if your getting a PSU upgrade go for a Corsair, they come with a 7 year warranty, so keep yout receipt.

I guess your from the U.S. so I can't recommend where to buy from but I'm sure there are plenty peeps here who can

Best Buy is overpriced when it comes to graphics cards, but ok when it comes to psus and they do have the GS series for corsair so like the GS600 would be fine for really anything. Microcenter and Newegg.com and possibly frys are the 3 main providers in the US for computer parts. I would look there to see what they have on sale. If you are looking at newegg, look at the 6870 there are a few of those that are about the same price as the 6850 and it is a step up in performance. If you are looking at Nvidia look for the GTX 560, there are two kinds of these the more expensive one is GTX 560 Ti but it does cost more and most people would say to move to AMD's 6950 1gb at that poin.t

Brands for AMD are Sapphire, HIS, XTX, Gigabyte, Asus. If you go Nvidia EVGA, MSI, Asus, Gigabyte. Those are really the "favorites" and you cant really go wrong witha ny of them, some have better fans and some have better warranty's but you will probably have to look into that on a card by card basis.

I know thats a lot of information, but hopefully it'll be of some help.