Warrenty is on Asus's end, not ours, but i'm 99 percent sure that you will get manufacturer's warrenty with it.
A 8400 should run latest games, now at high, but at low - medium.
And no, most laptop cards are built onto the motherboards thus making it impossible to update graphic cards.
You should call up Asus and ask though, i usually only work with Laptop memory and Desktops.
Current Consoles: Xbox 360 Elite, Playstation 2, Gaming Rig, Nintendo Wii, Playstation 3.
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