Upgrade dell inspiron 545 CPU

enterocin

Distinguished
Nov 16, 2011
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I have an ancient dell 545 with following config,

E5400
8 G RAM
500 G hardrive
300 W PSU
GT 520 graphic card.

I don't want to deal with reinstalling all the programs with new mobo + CPU. So I only have limited options with intel quad cores.
I just want to make sure what quad cores are compatible with my PC? Also where I can get the quad cheaply?
Thanks.