Which laptop does Sheldon Cooper have?

I would like to have the first laptop Sheldon Cooper owns in The big bang theory. Could you tell me which model it is? Would like it in my "collection collection"

I mean this: http://www.hifi-forum.de/bild/sheldoncooperlaptop_217098.html

I already have this from Alienware: https://www.prosieben.de/stars/news/the-big-bang-theory-staffel-7-sheldon-verschwindet-im-finale-spurlos-180757

https://www.cnet.com/...0-preview/

Thanks, let's see if I can still find such a model.

Sorry