Dell 1.2 V 370-ADPS Computer RAM, Form Factor: DIMM 288-pin
RAM Sizes: DIMM VS. SODIMM VS. MicroDIMM
4GB Memory for HP ProDesk 400 G3 Small Form Factor DDR4 2133MHz DIMM RAM (PARTS-QUICK Brand) at Amazon.com
DIMM - Wikipedia
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with HP/Compaq® Compaq 8200 Elite Small Form Factor Pc - A66 at Amazon.com