Guys i have a pretty basic system with a core i3-2100 and a 450w PSU on a intel Dh61WW mother board. Now my question is that i am going to buy the zotac gtx 750 ti 2 GB GDDR5 GPU and upgrade my RAM from 2GB to 6GB so will my processor and PSU be able to power my GPU and will it bottleneck ? my priority is performance than quality so i just want to play all the latest games at 1080p but with medium or low settings so will this upgrade work ?? also if i consider upgrading to an i5 then how much of a difference will it make and will i have to upgrade my PSU then as well ? thanks alot !!