i am buying a PC from a shop, they have a up-gradable graphics card option which one of these cards is the best? and also which is the cheapest and the best option.
GT 210 1GB GDDR3
GT 610 1GB GDDR3
GT 610 2GB GDDR3
GTX 730 2GB GDDR5
GTX 740 1GB GDDR5
GTX 740 2GB GDDR3
GTX 750 1GB GDDR5
GTX 750 2GB GDDR5
GTX 750Ti 2GB GDDR5
GTX 760 2GB GDDR5
GTX 760 4GB GDDR5
GTX 970 4GB GDDR5
GTX 980 4GB GDDR5
GT 210 1GB GDDR3
GT 610 1GB GDDR3
GT 610 2GB GDDR3
GTX 730 2GB GDDR5
GTX 740 1GB GDDR5
GTX 740 2GB GDDR3
GTX 750 1GB GDDR5
GTX 750 2GB GDDR5
GTX 750Ti 2GB GDDR5
GTX 760 2GB GDDR5
GTX 760 4GB GDDR5
GTX 970 4GB GDDR5
GTX 980 4GB GDDR5