upgrade dell optiplex 745

Mikey9999

Honorable
Nov 26, 2013
8
0
10,510
Has a Pentium D and 2gb ram. I want to upgrade the ram to 4gb and replace the CPU.
I think performance would be fine if I simply upgrade the memory, but I am concerned about the heat from the CPU. I reversed the front fan so the hard drive does not overheat, but I get a blast of hot air out the front. Would an E6600 be cooler?