I am planning to buy a cheap graphics card.I did some research and finally got into two cards,both having same price;the Nvidia Gt 640 1GB DDR5 and Radeon R7 240 1GB DDR5.
Basically, Both are nearly same.. but if i have to choose between them I would say R7 240 DDR5 is better than GT 640 DDR5, R7 consumes less power (30w) less noise and its raw performance is better than GT 640 DDR5