it is most definatly not worth the expense unless you are moving to a new cpu platform.
I5 would be a good upgrade for you.
On that note though you might want to wait a while, the prices on ram are sky rocketing justnow.
There is better performance to be had on the i5 chip than the AMD chips.
Unless all you do is game on the pc when you will only see the advantage in cpu intensive situations...
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