Originally Posted by
ThewF
1) You would need a better Processor to achieve a higher frame rate in World of Warcraft, Dual, Quad, Hexa they're all good.
2) 2GB of ram is essentially the minimum needed to use Windows 7
3) Your 9600 GT is decent enough to play World of Warcraft at 1440 x 900 with medium settings, however your processor is going to limit the View Distance drastically.
Basically I'd start by buying a 2GB kit or 4GB Kit of memory (Kit's are generally better since they're the same manufacturer and memory batch) and then throwing something like an Intel E5400 into your motherboard assuming you're on the 775 platform. However if your processor is even older then the 775 series or you're on an AMD 1.8GHz or below my best piece of advice is telling you to go either to Core i3 or Corei5 and upgrade to DDR3 with a new video card doing this will result in a better gaming experience for at least another two years.
Now onto the next part.
Horrible idea, most 2 x 1GB Kits or (2GB Memory Bundles) are Dual-Channel using a third stick of memory is going to disable your dual-channel feature and that will result in a loss of performance in most situations. In addition 10 FPS in 25 mans is common, it's why 10m is still popular. If you want a decent FPS in 25m's you're either going to need a somewhat powerful Dual-Core or a decent Quad-Core with World of Warcraft running on the fourth core's affinity.