Install discrete graphics (NVS 4200M) on T420

[Foroni]

Hello, everyone.

Is it possible to install a Nvidia NVS 4200M discrete graphics on my T420 that I bought with only the integrated Intel HD 3000?

I've searched but I didn't find this information.

[Cigarguy]

No. That's why you haven't found any info on this.

[JohnD.]

You could swap out the board with one that has the Nvidia GPU or sell the T420 and buy a unit with the Nvidia 4200M. If I had to take a guess, selling the T420 (Intel) and purchasing the T420 (Nvidia) might be the cost effective path. I don't know what a T420 (Nvidia) logic board sells for these days.

With regards to swapping out the board, I have taken apart two laptops in my lifetime. One had no screws left over and one had a few (both non-Thinkpads). The machine with the extra screws did not have a manual to take it apart, so having one helps.

It's a matter of getting a hold of the Hardware Manual and following the diagrams in it, grouping the screws together (say in an egg carton or plastic cups) and labeling them. You can do a google search using "hardware manual t420" if you want to get a copy of it. I have printed it out at work and got it spiral bounded (with a clear cover and a black back) at a local printing store.

Good luck,
John