I have a Toshiba Satellite M45-S169 with ONE open slot, I got some hynix pc2-4200s-444-12 before it was given too me an has 512 mb in it already with xp home on it.  I wondered if I wouldnt be able to use this with it.  I used google an it said that it was ether ddr or ddr2 not sure but I THINK that the laptop uses ddr.  Also I have no clue how to get it in since I dont really work with such things.Go to Crucial.com and run the online scanner...
It will tell you exactly what RAM that laptop will take...I'll have to do that LATER really cant at the moment but can you tell me if the ram is or not?No.
I can't run the laptop scan for you from here...sorry.squall did you go to Crucial?


http://www.crucial.com/store/listparts.aspx?model=Satellite%20M45-S169I was meaning the hynix an no I cant at the time.  Well ddr2 don't work on your laptop you need ddr.so thats what the memory is?Yep   you mean the hynix right?  Cause I pulled them both up on google an dont notice any difference in the two.Had you gone to the Crucial site you WOULD have your answer by now...That I have it still dont tell me really wether that the hydrix is ddr or ddr2 cause I seen that it looks like ether one.Well,it's ddr2.

http://zkarlo.powweb.com/selected-zkarlo-part/ram-p679.phpokay cause I seen were they were CALLING it both an I wasnt sure.