[dlwh]

Aren't the ram chips usually soldered to the mobo on ultrabooks? Crucial indicates they can't upgrade ram on the XPS13. And a little googling says soldered RAM... Nothing on the Dell website suggests they can upgrade past 4.

[jakeonthemove]

Damn, you're right, the XPS 13 is non-upgradeable. the Samsung Series 9 and Series 5, as well as the Toshiba Z830 are, though...