512MB 100 pin DDR SDRAM DIMM for HP. Third Party Equivalent to HP Part Numbers: Q2628A Q7720A . Major brand memory. We do not sell "OEM" memory which may be incompatible, unstable or prone to early failure. Major brands are Micron, Infineon/Qimonda, Samsung, Hynix, Promos, Nanya, Elpida. Compatible with:HP LaserJet 5200 5200n 5200tn 5200dtn