hey there you need to have strong cpu to push strong GPU forward Strong cpu needs a good mother board & enough ram & good PSU . so it means if your going for Gaming graphic you need your other parts to be good & for Monitor good choice . big monitors will make you pay so much for Specs .
ok for that monitor i will recommend you these :
CPU : i5 3470 ( or newer 4xxx series ) & go for Non k cpu if your not going to overclock
Mother board : ASUS P8H77-V LE ( dont go for Z series unless you want to overclock )
Ram : 2x4GB DDR3 1600Mhz or 1333mhz
PSU : 650-700watt quality PSU
im having this system with Windows 8.1 & i can assure you Performance is GR888888 . since we both have 17 ish monitors . games dont need ultra res so you can maxout everything & play them above 60FPS . yes, im talking about BF4 , METRO Last light & ...