A-TECH 4GB STICK For HP Compaq Elite 8100 Business PC (CMT,SFF) 8000 Convertible Minitower Small Form Factor 8100 8200 Microtower. DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine Brand. 4GB STICK DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For HP Compaq Elite. (See Compatibility List Below)