I guessed that after I noticed you were talking a MK4 and the OP had a MK2.
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toughasnails Toughbook Moderator Moderator
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The first ram you tried was this. It is high density. Some machines will not work with high density ram Some will. I can not recall if a CF74 will work with high density or not. I am guessing the other stuff you just ask about is 2Rx8 which is low density and considered to be universal and will work in almost any brand laptop.
Crucial recommends this: Crucial 1GB DDR2-667 SODIMM CT570404
panasonic toughbook cf-74 will not load up past panasonic boot screen after replacing memory
Discussion in 'Panasonic' started by joe0311, Mar 7, 2016.