How can I get the memory manufacturer?

[The Coolest]

How can I get the name of my memory stick?

[Placid]

SisSoft Sandra can identify alot. Other than that pull it out and get the code off the chips on the memory or might be a brand name on the memory pcb.

[The Doors]

Or MotherBoardMonitor, into the System Info section pressing the black chip that you found down/left, or Ctspd that you found at http://www.heise.de/ct/ftp/ctspd.shtml

I hope it helps you ;-)