I have a laptop with the PM45 chipset (Toshiba g55-q801). I am interested in upgrading my GPU, does anybody know where I can find out what if anything I can upgrade to.
In any given laptop, the chances of you being able to (let alone it working) are around 1/100.
Toshiba doesn't use modular cards, so you can't upgrade it. Even if you could (perchance they decided to on your model) the likelyhood of being able to fit a more powerful card with a higher TDP and power requirements is...not good.