ThinkCenter M91p SFF, what kind of RAM?

[khtse]

I'm in the process of acquiring a few cheap quad-core desktops to help running my research project. I came across this M91p with Core i7 2600 for $470 including shipping and tax... What a deal, I don't think I can build one this cheap. Anyway, it comes only with 4GB of RAM, and I need more for the programs that I'm going to run on it.

I know regular M91p uses desktop RAM, but this is the tiny small form factor one. Anyone knows if it runs desktop- or laptop-size memory?