661-3680 DIMM 1GB SDRam DDR 400 for Mac mini NB-5130W
This is a single 1GB DDR PC2700 DIMM chip. This is for use in desktop systems, and is not a SODIMM chip like laptops use.
Apple part number: 661-3680
Mac mini (Late 2005)
661-3680 DIMM 1GB SDRam DDR 400 for Mac mini