MB for Compaq Professional Workstation AP400 computer 350S1/400S1/450S1 256 MB (4050871067912) - 256 MB, New product sold by a professional on-site Amazon.fr - 256MB memory fit - HP / Compaq - Professional Workstation AP400 350S1 / 400S1/450S1appareil / memory information original number. 317739-B21 model number of the article. EMCQ256773