Hi Roxy, congratulations with Matt's birthday.
I did google on
Dell ram upgrade and among others this site came up.
On the following page you can select exactly which type of Dell Matt has. There are a few Dimension 5100 models. So, make sure to pick the right one.
Dell Memory Upgrade - Dell Computer RAM Memory
I did select the standard Dimension 5100 and these memory modules came up:
Dell Dimension Memory - Dimension 5100 Computer Memory Upgrade
This does look like it might be special Dell memory, like Jesters allready told.
Now, first make sure how much memory he allready has (rightclick on
My computer) s0omewhere at the bottom of that window you see something like 1,00 GB or 512 MB that is the value you are looking for. Confusing enough it mentions the speed just in front of it some value with GHz behind it. But you need the value just behind the GHz.
Maybe you should tell us how much is in there, so we can warn about things to think about before buying new memory. I could tell several things in advance, but that would probably confuse you because of the "if this then that" language used
