My Motherboard is ASUS M2N68-AM PLUS with 3GB DDR2 RAM AND AMD ATHLON-II X3 PROCESSOR. I WANT TO BUY Sapphire AMD/ATI Radeon HD 6450 2 GB DDR3 Graphics Card. Please advice whether this graphics card will work on my existing system.
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a 6450 is a pretty low end card. it is not going to be doing high end gaming at high resolutions with settings on even medium . here is a tom's review http://www.tomshardware.com/reviews/radeon-hd-6450-caic... it will get less than 20 fps in most games even at 720p resolution. that said you can play some games in low settings at a medium resolution and given the rest of your computer setup it isn't a bad choice, your cpu is not going to be able to support high end gaming either
budget is the biggest factor, given your cpu it would be a waste to throw in a 680 or something that powerful. a good match would be a amd 7770 can be found for $100-$140 depending on clock speeds but would play most games at high setting though in games like crysis you migh tneed to go down to medium