Hey...Sarah is Back!
I have a 3.40 ghz dual core in my pc and am thinking about swapping it for a core 2 duo e7300 wolfdale 2.66 ghz. which would be better for performance with games.
Any C2D is better than your current CPU.
Which Dual Core? Are you talking about a Pentium Dual Core (ie E5200) or Pentium D? List full specs.
even the pentium dual core e5200 which is 2.5 ghz will be faster than your pentium d at 3.4ghz
Based on his post being so simplistic I would guess a Pentium D since they went that high and that he is not super tech savvy. So my conclusion, E7300 will be faster.
Pentium D 945 presler
The E7300 is much better, but you'll have to check to see if your motherboard will support it.
^+1.