I have 4 1k mb ram, which yields around 3.5 gb ram, but with browsers and different apps running at the same time, the cpu meter on my wxp-pc is up to 100% way too often.

I want to upgrade the cpu on this pc from amd-dl-cr-3500 to amd-dl-cr-5600, would that help keep the cpu meter level stay lower more of the time, with similar use of the pc ?

"For one, you add to the list of clients that provide confirmations to the network."

Does that mean that running it helps in the efforts of speeding up the mining of Bitcoins and Devcoins, which involves completing of blocks ?

So far I've been running the dvcn-app all the time.