Chosen Solution
Which CPU upgrades are possible? I’m assuming it is not soldered onto the motherboard, because the article I read, said it could be done.
Laptops & Tablets tend not to offer CPU chip upgrades as the thickness of the system would suffer with the added height of the socket. You might find a replacement logic board is an option if HP offered up a version with either more memory or a higher clocked CPU. Reviewing the spec sheet for your system this system uses an Intel 1.8 GHz Adam Z2760 CPU with 2 GB of RAM and is the only configuration HP offered so there is no logic board swap-out option.
