I'm on my old 400mhz celeron since my motherboard and power supply on my new system are broken. Anyway, I want to upgradde the RAM on the piece of crap because it has 64MB of physical memory and is using about 60MB of virtual memory with nothing running. How do I tell what kind of RAM it is. I'm guessing it is either PC100 or PC133. How do I tell what kind it is. I took it out to see if it said on it but it didn't. So if you know please help me out.