fahad_132...by the way my budget is not more than 40,000 PKR...Thanx
Asus vento is not really necessary i think. Any good cooler master casing will do just fine.
Because you want to make a gaming pc you need to save money in the budget for a good graphic card. The online graphics will NOT play the games you want. I think that consider a dual core system as well.
Therefore I suggest the following which will play all the games you have listed easily:
mobo: Asus P5KPL-AM Second Edition. rs 4350
pro: E6500 2.93 GHZ dual core. rs 6800
Ram: 2 gb ram ddr 2 800. rs 3700
case+ps: COOLER MASTER CHASSIS CM ELITE 333 WITH 420W power supply. rs 4600
for gaming: His 5750 ATI PCX ICOOLER IV 512MB (128-BITS) DDR5. rs 12000
dvd rom: samsung dvd rw sata rs. 2000
Hard disk: sata 2 500 gb rs. 4000
If you want a core i3 system with a good graphic card then i suggest you increase your budget. You will definately have to add a graphic card because the onboard graphics of core i3 are not good i am afraid..