HP N77571-001 is an 8 GB memory module intended for compatible desktop systems. HP’s service guide identifies this exact spare part as a NECC memory module, giving a clear reference for repair or memory replacement in supported configurations.
It uses the UDIMM form factor and is specified as PC5-5600. The module fits a motherboard memory socket; its desktop DIMM format distinguishes it from compact laptop memory modules. HP lists N77571-001 for the ProDesk 4 Tower G1i Desktop AI PC service parts, though that listing alone does not establish compatibility with every configuration of that system.
This is a practical option when replacing the identified memory spare part or adding a module to a compatible desktop setup.