I just bought Dell XPS All-In-One XPSo27-4119BK. I wish to upgrade processor and graphic card by myself. I wish to upgrade CPU to i7-3770s (I have i5-3450s now), and Graphic card to GTX 675MX (MXM 3b) - I have GT 640M now. Does existing motherboard allow to make this upgrades? Does it have sockets for CPU and Graphic card to upgrade them? Thanks a lot for your answers!