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Can DDR3 DIMMs be plugged into DDR2 sockets or vice versa?

April 26, 2017DDR2 DDR3 DIMMs plugged Sockets versa

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Can DDR3 DIMMs be plugged into DDR2 sockets or vice versa?

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No. Memory modules (Unbuffered, Registered, Small Outline DIMMs) have a special “key” or notch in their connector. These keys must align with a key in the memory socket to allow the module to be inserted. All DDR3 and DDR2 module types are keyed differently.