It's time to upgrade when you think your current PC is too slow for whatever it is you use it for.
MHz for MHz, a Sandy Bridge CPU generally has about 25% - 28% more performance than a 1st generation C2D / C2Q CPU.
Generally speaking, the Core i5-2500k would be better for games than the Core i7-2600k which costs about $100 more. The i7-2600k is 100MHz faster than the i5-2500k and it also has Hyper Threading (HT), however games do not use HT (at least not yet).
why dont you overclock your CPU? If your not comfortable with overclocking then yes, new CPU would be a good idea. If you can OC the cpu to 3.2ghz then you can wait a bit longer, new CPU's are just around the corner from both intel and AMD.
Thx for Replys
Jag your right my PC has always played everything I have ask it to with very good FPS.
I have had this chip for a long time...its just hard to see all the new shiny CPU and not want one..
I may try to OC it never really tried to not sure how far i could take it on air.