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Are these compatible?

Last response: in Motherboards
a b α HP
a b V Motherboard
October 9, 2010 9:51:50 PM

I have 2 memoru chips from my HP that are 1gb 2rx8 pc2-4200 and want to put them in my emachine that has gddr2 memory. will this work?

More about : compatible

a c 716 V Motherboard
October 9, 2010 10:48:51 PM

Welcome Newcomer! :) 

If the speed, CAS, and Voltage is the same in your eMachine then maybe. The 2rx8 pc2-4200 is DDR2 533 MHz; as best a I could determine it is Hynix* HYMP512U64BP8-C4 AB CAS 4-4-4 Non-ECC DS:512Mx8.

However, if you have a newer eMachine then I would recommend against it. Chances are it will NOT work.

To get more information on your current DDR2 use CPUz -

Look at this screen; take the JEDEC#2 MHz multiply x 2 {e.g. 533 MHz x 2 = 1066 MHz -> DDR3 1066 (PC3 8500)}

Good Luck!
a c 87 V Motherboard
October 9, 2010 11:47:29 PM

gddr2 will only be in a graphics card

generally system RAM will be compatible if its the same type ie DDR2 , but it will run at the speed of the slowest module , and its often a good idea to have that slowest module in slot 1 which should be nearest the processor
a c 716 V Motherboard
October 10, 2010 2:15:00 AM

^ I assume the OP made a typo "GDDR2" bit until they post more info there's no way yo know for certain.