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Windows 7: Old Computer with Modern RAM -- is this a problem?

29 Mar 2013   #1

Windows 7 Professional SP1 64 bit Retail
Old Computer with Modern RAM -- is this a problem?

I have an old Intel Core 2 4400 currently running with 2 GB DDR2 RAM. I also have 3 sticks of DDR3 (2G each) from my newer computer that I replaced with faster RAM. Can I install 2 sticks of the DDR3 into the Core 2?

I'm having a hard time finding out what is the appropriate RAM to install into this old computer. The computer is on its last legs but we're trying to hold off getting a new one for as long as possible.

My System SpecsSystem Spec
29 Mar 2013   #2

Windows 7 Home Premium 32-Bit - Build 7600 SP1

The RAM has to be compatible with the Motherboard. Tell us what you have and we can help.
My System SpecsSystem Spec
29 Mar 2013   #3

Windows 7 Professional SP1 64 bit Retail

As best as I can find out:
Intel Core 2 4400@2Ghz Duo
Em64T Capable
Intel Corporation D945GCNL AAD97184-102

I've run Belarc and CPU-Z and this is the best I've come up with.

Most of info I've found is way too technical for me. Can't find anything in laymans English.
My System SpecsSystem Spec

29 Mar 2013   #4

Win7 Home Premium 64x

from the looks of it, your board is this:

and it is only compatible with DDR2.

Two 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets
Support for DDR2 667 or DDR2 533 MHz DIMMs
Support for up to 2 GB of system memory

DDR2 and DDR3 are different specifications and are not backward or forward compatible.

in fact. I don't think they will physically fit in the same slot: DDR2 SDRAM - Wikipedia, the free encyclopedia
My System SpecsSystem Spec
29 Mar 2013   #5

Windows 7 Professional SP1 64 bit Retail

Thanks for that document. It told me, essentially, that we have to get a new motherboard as the max RAM is 2GB. No matter, the computer is on its last legs and perhaps this is the time to upgrade.
My System SpecsSystem Spec
30 Mar 2013   #6


The design of the slot will be different in your case I suppose, so it might not even fit anyway.
My System SpecsSystem Spec
30 Mar 2013   #7

Windows 10 Education 64 bit

DDR3 will not fit in a DDR2 slot and vise versa. There is a notch on the edge connector that lines up with keyway in the slot.. It's in a different position for each different type of RAM, DDR1 will only fit in a DDR1 slot, DDR2 will only fit in a DDR2 slot etc. It's done that way so you don't accidentally mix things up and fry your motherboard.
My System SpecsSystem Spec

 Old Computer with Modern RAM -- is this a problem?

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