Cpu fan upgrade

Oct 2, 2018
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Im looking to upgrade my cpu to a quad core in my Dell Optiplex 780 sff and i am not sure if ill need to upgrade the fan or will the stock cooler would work but im not sure what cooler will fit if i need one.
 


You can't change the heatsink, like I mentioned above. It should be sufficient for faster cpus as Dell had i7s in that form factor.
 

So i wont need to upgrade it to intstall the core 2 quad?