This piece of crap uses a completely non conforming power supply.  All kinds of reviews of how you can add larger video cards, but with this model they have changed the power supply configuration to some little 300W power supply that does not conform to any power supply I have ever seen.  New motherboard connections, new size factor - absolutely no way to port over the real power supply I had intended to use.  Amazon needs to quit lumping reviews and comments for several different models together as it is very misleading.  You want to run excel?  Maybe its an ok computer.