The GPU upgrade is only available from Dell. I'm making a big assumption you did your homework and found that this GPU is on a card and not on the mainboard like most laptops.
As to the CPU, I research it like this. I find the documentation on dell.com for the model line and read if it came with any faster CPU.
Hope this helps,
I got a Dell M6400 Workstation Laptop and are looking to upgrade my Video Card (GPU) and my Processor (CPU)
My current video card is a Geforce Quadro FX2700M 512MB Memory
and my current processor is a Intel Mobile Core Duo P8600 2,4 GHz.
Can anyone give me some tips to what hardware i should/could upgrade to?
I want to be able to play newer games, so i am perhaps looking for a Video Card who supports Direct X 11.
Hope you can help me!