Update CPU from Z530 (1.6GHz) to Z550 (2GHz)

I'd like to revive an old (but in perfect status) VAIO P VGN-P19VN, that sported an Atom Z530 with 2GB RAM and a 128GB SSD.

Some years ago I paied the machine somewhat like 1500$ and just some months later the iPad (that I immediately bought) destroyed its market.

Nonetheless it's still a perfect portable machine, updated to Win10. It's main problem is that... it's terribly slow.

And probably it would be possible to update its CPU to a 2GHz one, squeezing about 30% more power.

Has anybody tried it, like in this post?

http://www.pocketables.com/forum/showthr...

Would it be possible, without soldering?

Thanks, best

Gianluca