Start a Conversation


Go to Solution

1 Rookie


33 Posts


January 29th, 2023 16:00

Vostro 3900G MT CPU Upgrade

Advice, please.

My PC came new with a Intel Core i5-4460 @ 3.2 GHz 4th Generation CPU.  I am thinking to upgrade it to Intel Core i7-4790 @ 3.6 GHz 4th Generation.

Would I need to change the Dell heat sink and 64CFM CPU cooling fan already installed?

Many thanks.




7 Technologist


10K Posts

January 29th, 2023 17:00

The two cpu have same TDP of 84w.

If you have the 65w heatsink now there is option to upgrade to 95w heatsink or heatsink of copper core optiplex XE2 which can support i7-4790k.

Cooling Heatsink + fan, 65W, MNTW/SLTW

Thermal, Heatsink, 65W, 62 0

Dell WN7GG
Cooling Heatsink + fan, 95W, MNTW

XPS 8300 Intel Corei7-2600 processor(8MB Cache, 3.4GHz)



the 65W heatsink is thinner 


the 95W heatsink is thicker 



1 Rookie


33 Posts

January 29th, 2023 19:00

Many thanks for your detailed reply.  All the best.

No Events found!