Nvidia geforce gt 610 vs. Radeon Hd 6570

Both are LOW end PGU. Save some $ and get 7xxx series.

And now tell me the system spec (ALL)

i am saving money up for a new one. i just got it in a barebone bundle!

ASUS 970 AM3+ Motherboard
AMD FX-6300 Processor 3.6 gh 6 cores
8gb corsair ram
and which ever graphics card

With that setup I would say an HD 7850 will do very good or the GTX 650 ti. Whatever strikes your fancy, Nvidia or ATI. Also what resolution are you playing at? I myself can run Fallout 3 and New Vegas on the highest settings with an HD 7770 and phenom II X4 955, though since Fallout 3 has so many bugs it crashes quite a bit for me unless I find those user made fixes....  

I would also like to know which of these two graphics cards is the best. My budget is about 60 bucks and its either a GeForce GT 610 2GB DDR3 Superclocked Edition or a XFX Radeon HD 6570 1GB DDR3. I know that I could get a better graphics card, but I'm just getting this to build a PC that can play Sims 3 @ high settings for my cousin.

I see, is this within your reach?
http://www.microcenter.com/product/403020/R6670-MD1GD3_...