You've cut off the memory in the photo so it's very hard to tell exactly what it is - but mak-daddy is asking the right question - is it a laptop or a desktop? Google "Desktop DDR 1GB" and see if the pictures look like what you've got in your system.
From the photo, that looks like laptop RAM due to the clip and how it's on its side. Also, the pin layout looks like SO-DIMM. If the OP can post the model of the system, we could help him a lot easier.