Why are desktop GPUs so big & mobil GPUs not???

[Edward78]

Oh man, if they were around that size with the same performance...

[Jaxzzzzz]

the actual pcb is not what makes a card large, on a desktop the cooler is what makes it a greater size, in a laptop the cooling is usually less

[Brooksie359]

You are comparing 2 different gpus in one video and in most cases the laptop variant of the 10 gpus are the exact same size they just have different pcb and cooling. 

[GrockleTD]

[Quadriplegic]

Actually, there is not much of size difference between laptop and desktop GPUs.

However, laptop and desktop video cards are different story.

[vatsan]

Desktop GPU is clocked at a higher rate than a laptop so almost every desktop GPU has minimum 70% of a heatsink pipes and kinds of stuff

[Edward78]

10 hours ago, Grockle88 said:

.

OK, ok I meant PCB... You know what I was talking about..

[Crunchy Dragon]

For one, desktop cards don't have to be portable like laptop cards do.

[Mira Yurizaki]

A few reasons:

• Laptop video cards don't have to run display interfaces out through the "normal" way. So that chops off a non-trivial amount of space needed
• The power delivery circuitry is much simpler. On a desktop video card this accounts for almost half of the PCB space. It's not like the GPU on the laptop is going to overclock or boost much anyway so there's less need to have beefier power deliver circuitry.
• Cooling and mounting needs are different. Desktop cards use beefy heat sinks which need better mounting solutions so the card doesn't buckle over. Laptops have lighter cooling systems that are mounted in various places that spread the load, so such load bearing features (like how many mounting holes there are on the desktop board, how far apart they are, and the metal border around the GPU area) aren't necessary. This helps relieve some space that would've been taken otherwise.

Otherwise the rest of the MXM board is packed as tightly as possible. On a desktop card you have lots of room to work with, so why not spread things out more (if it doesn't hurt the signal)

Edited May 16, 2018 by M.Yurizaki