Put Alienware,Dell xps & Hp envy a side & compare normal branded pcs with custom p /Non branded pcs well for all I know is the biggest draw backs of a branded computer is that you cannot overclock it , change it's casing or it's motherboard , it comes with useless bloatware software which you don't really need & the advantages I know of a branded pc is that it's casing be stronger compared to a custom pc & a branded computer is a bit faster than a custom / non branded pc due to it uses the hardware of the same brand (OEM) but the gamers I personally know prefer custom pcs cause you can built them however you like