looking for graphics card

i read in game debate.co m about this card .
they said that recommended ram should be of 8gb. So should buy this ?

Pc specs are
Intel i5 3.0MHz
400 W smps
4gb Ram ddr3
1tb hdd
Intel mother board dh61ww
geforce gt210 1gb graph card
 
The amount of RAM your PC has installed, does not affect in any way what GPU you choose. Genrelly speaking, a medium/high end gaming PC should have a minimum of 8gb of RAM, as this allows for the increased RAM usage when playing games on higher settings. A 650Ti will not play modern games at the highests settings, and so you dont need 8gb of RAM. If you were concerned about this then I would siggest upgrading to 6gb to be safe, but I wouldnt say it is essential unless you are going to be running multiple programs in the background at the same time as playing games.
 


On that budget im afraid you cant really get much better than the 650. to really make a difference you need around twice that amount. Sorry. =(