a core i7 3770k , - 32k
asrock z77 mobo - 13k
power supply 750W - 8k
plus a decent chassy - 5k ,
cooling solution (heat-sinks with fans) - 4k
8 gigs of ddr3 memory - 9k
Gtx 650 ti - 16k
total 87k
now currently there is no game on earth currently that cannot be played on this configuration smoothly , yes for games there would definitely be a lag on 1080 resolution , and the fps wouldn't be the best 60 .
but , for that high of a resolution , the negligible difference is never noticeable if one is playing on a standard 19 inch screen ..
yes things do become different if one is willing to play on a 30 incher ...
but for that you can put the GPU in SLI , and then there is no game that cant be played smoothly on this configuration ..
some would run smooth on 720 , lag at 1080 , but MOST would give a very smooth performance ... even at a single gpu working ..