I happen to have received an Ibm Thinkpad a22m 2628 without any ram. I have checked around online and I have checked Crucial. Crucial says the type of ram is pc133 and other sites say its pc100. Which ram is the correct type ram to find for this older laptop. I do know the laptop works since someone did leave an old copy of an xubuntu 6.10 cd in it. All i have to know is which type pc100 or pc133 and then i will be able to run this old laptop very nicely. The specs i have found say i can run a max of 512mb in 256 sticks. i wouldn't want to end up with ram I can't use if it ends up being the wrong ram.