Hello dmagnant The heat sink that is currently in the server should work fine. We only have one heat sink that we ever shipped for the 840 and it is used for all CPU configurations: KJ582 HTSNK, Pin Grid Array, 2.5X3.5X4.27 Thanks
Hello, I have a PowerEdge 840 that shipped with the Pentium D 3.0GHz processor.  I wish to upgrade this system to a Xeon X3210 which was one of the Dell factory offerings for this server.  Question.  Did the factory configuration use the same heat sink for both of these CPUs?  Is there any reason to think the tall finned heat sink which shipped with the original system will not suffice for the Xeon chip? Thank You,
PowerEdge 840 Heat Sink Question