PC-100 or PC-133 SDRAM will not fit into a DDR SDRAM slot. If you look at the bottom edge you will see that the number of notches and the spacing of them are completely different. Even if they did use the same sockets, they are not at all compatible with each other, to the point that if you have a motherboard with both sockets you would only be able to use one type of RAM at a time.
ou can probably run PC100 and PC133 Low Density RAM.
Yes it will. I have 512 MB PC100-322S installed and working with 2x256MB PC133-333 on my G4 Mac.
"Compaq Presario" is the name of a line of computers. It does not refer to any specific model. Without further information, no advice on whether or not it is compatible with your computer can be given.
It all depends on the motherboard in question. Look in the motherboard's manual. If you don't have the manual, look up the model number online.
Depending on its age, either SDR SDRAM, DDR, or DDR2 RAM.
100 MHz
In principle, you could 896 MB, however you'll almost certainly have to remove the 128MB memory and replace it (probably with two 512MB). If this is what I think it is, namely a blue and white Apple Power Macintosh G3, the computer had two 64MB DIMMs in it when it shipped. You have three options: Install two 256MB DIMMs (always PC133--the book says PC100, but PC133 is compatible and it's all you can get now anyway) alongside the 64MB DIMMs to have 640MB RAM. Remove one 64MB DIMM and install three 256MB DIMMs for 896MB. Remove both 64MB DIMMs and install four 256MB DIMMs for 1GB.
pc100
PC100 is a type of memory, and doesn't affect (for your part) battery life. Consider getting a latop with different memory, which will likely be faster and more battery efficient (such as DDR memory).
The iMac G3 memory slots take PC100 SDRAM.
The max memory for the Thinkpad T22 is 512 PC133 in a 256x256 configuration. The notebook has stepping technology so you are not restricted to PC100. It is backward compatable, but it was designed to go to 133, The only thing you should note is that you can't mix the two speeds. You either have two 100 chips or two 133's not one of each.Again, you are correct. The max per slot is 256mb for a total of 512mb. And the max speed is 133Mhz.In addition, any RAM installed must be the low-density type.
as long as the chip type is the same, yes you can. The problem will be that you will be bottlenecking the speed in your system because your computer sets itself to the slowest part.