What 2gb memory should I get for my PC

[Phil2008]

At the moment I have cpu speed at x11.5 multipliyer and mem is at 242 bus speed, timings are 2.5-3-3-3 1T. so my cpu running at 2.78gh

I have a FX55 cpu(see in sig), bare it mind the cpu wont overclock any higher ther 2.78. What mem should I get and will I be able to push the mem any higher then 242 and lower the cpu speed to keep it at 2.78'?

 

[Phil2008]

At the moment my cpu is at 242 x 11.5 = 2.783 actual cpu speed

But want cpu running at 265 x 10.5 = 2.782.5 actual cpu speed

So what sort of memory would give me 265 at 2.5-3-3-8 1T? Remember I cant get the cpu any faster then 2.783, and will my motherboard take higher mem then 3200?

 

[Phil2008]

cant use dividers with my motherboard i dont think?