Komputerbay 2GB (2 x 1GB) DDR DIMM (184 PIN) 400Mhz PC3200 CL High-Density Memory 3.0 - Not for Intel motherboards like Dell, Sony, etc. (Personal Computers)
I understand why two Intel Pentium 4 PC equipped these memory modules were not functioning at the time of my purchase, it was not specified, fortunately that's an old pc with AMD which they work very well.