How to figure out what type of RAM?

[Torfish]

I have a cheap secondary PC that I had someone build 2 years ago.  I need to increase the RAM on it.  I have no idea what type of RAM it uses.  Is my only choice to open the case and look at the stick(s)?  Will there be a sticker on the RAM stick that will tell me what I need to purchase more?

I know some PCs require you to use two sticks of the exact same memory size.  How do I determine if that is the case for my PC?

Thanks

[Zero]

You can look at the stick and try to identify the ram chips type, etc...but I think you might be able to see what type under your BIOS.  (edit: I'm assuming you are looking for speed type - PC2100, PC2700, etc.)

[stiffler]

CPU-Z will tell you what kind of memory you are currently running.  On mine it shows the brand, speed, size, and some other stuff.