will DDR3 work in DDR2 slots

Apple / G4 mirror drive door 1.25...
February 23, 2011 at 21:58:10
Specs: Vista SP2, 2 gig
i'm not entirely sure just how much of a difference , in regard to compatibility, there is between DDR2 and DDR3.. I bought some and it turned out to be the wrong size (how was I to know that iMacs use notebook RAM ;-)

so i got stuck with a couple 4 gig sticks of DDR3 (1333)
However, my other PCcould sure use some ram, but it has PC5600 (or thereabouts speed) DDR2..
The slots are the same, but is there any compatibility, or is it unworkable?As of now i could still sell these sticks, as they're still sealed in the plastic.. i would hate to open them up for nothing...
Anyone know?

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February 23, 2011 at 22:16:32
Totally different memeory:


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February 23, 2011 at 22:58:52
They use the same packaging(Ball Grid Array) but they are different
DDR2 so-dimm - 1.8v, 200-pin.
DDR3 so-dimm - 1.5v, 204-pin.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.

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February 24, 2011 at 03:39:29
You cannot use DDR2 and DDR3 on the same PC/Motherboard.

Tek Ideas Unlimited

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February 25, 2011 at 16:12:20
well thanks y'all for replying.. looks like i know something new.. just stuck OSX on the PC and gave it to my dad.. had an extra leopard CD so thought I'd put it to good use..
so the 3 gigs RAM that's in it now will do just fine for him...

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