That looks like your hotend temperatures were too cold for the material. You could also try changing the print orientation next time so the clamp forces are inline with the layers for more strength.
The specs on the W5100 do look good, but I would consider what type of CAD work your friend does before recommending a card. Currently on my work machine I'm using a Quadro K600 which is a low end card and I have no issues running Inventor 2012/2015 or Autocad2012/2015, but I generally deal...