HP 855565-601 motherboard is a system board identified in the HP ProBook 450 G3 spare-parts list. Its exact designation is DSC 2GB i7-6500U fDDR4 G3 WIN, which distinguishes it from nearby board variants listed for other processor configurations.
This part is specified with an i7-6500U configuration and fDDR4 memory designation. The source classifies it as a PC Board and a motherboard (system board), making its purpose clear: it is the system board component for the listed configuration.
The G3 WIN suffix is part of the listed variant name. The catalogue entry supports identification by part number and configuration; it does not specify package contents or additional board features.