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Use old MacBook Pro ram in new unibody MBP?

H

HerbyGunther

macrumors member
Original poster
Nov 24, 2007
48
0
Hi there, I've searched around on MR and Google, but didn't found what I needed, so will try it here.

I just bought a base model unibody MacBook Pro with 2 gig of ram. I have an old Santa Rosa model with 4 gig that I would like to use in my new one.

Is it compatible? Is it slower compared to 4 gig ddr3? I mean real world performance.

Thanks!
 
I believe if you put all four GBs in there, then it will work. But I think the issue is mixing DDR3 with DDR2.
 
I'm pretty sure it will work. But you'll have to stick with the slower speed and DDR2..

real world, not much, couple of percent. Surely it would be better to sell the old extra ram and put it towards some DDR3 for your new MBP
 
It wont work (i just tried and it doesnt on mine!) but you could always give it a shot, it wont damage your computer trying, and you my have a different manurfacturers RAM from mine :)
 
Thanks a lot! I guess I will not try it. :p My old MBP just died, I don't want my new one to die too. Will wait for the DDR3 modules. :D I will just have to hold out with 2 gigs.
 
Not only does it not work, but it won't even fit. They do this to avoid these types of actions. So unless you jam it in there which will destroy your laptop, don't worry you are safe from your ignorance.

Just take a look at the keying.

DDR3
20-231-212-04.jpg


DDR2
20-231-146-07.jpg
 
Wait, i'm having the same question. My computer just got stolen, and the insurance company is buying me a new macbook pro. I had a ram upgrade before, so they are getting me that, but the quote specified DDR2 ram. Is it DEFINITELY not compatible, or will it just slow down the computer?
Thanks.
 
DDR2 is NOT compatible with DDR3. Point out to them they need to pay for upgrade for same amount of ram (functionality argument) that will work with the system that is being replaced.
 
phl33t said:
Wait, i'm having the same question. My computer just got stolen, and the insurance company is buying me a new macbook pro. I had a ram upgrade before, so they are getting me that, but the quote specified DDR2 ram. Is it DEFINITELY not compatible, or will it just slow down the computer?
Thanks.
Click to expand...

Did you even look at the picture above? :confused:
 
DDR2 = 200 pin
DDR3 = 204 pin

unless you can magically fit 200 into 204, it won't work.
 
As others have said DDR2 RAM WILL NOT WORK in any Unibody MacBook Pros they use DDR3 only and it is not backwards compatible. DDR2 RAM will not fit in a DDR3 slot, and DDR3 will not fit in a DDR2 slot.

It's just that simple there is no way at all you can make DDR2 work in a Unibody MacBook Pro.
 
It's amazing how people do not read every post in a forum, when typically, the question is the first post and the answers are all the preceding posts. Hmmm...

Lets review what we learned...
DDR2 MEMORY DOES NOT FIT IN DDR3 SLOTS, AKA, OLD MBP MEMORY WILL NOT FIT IN THE NEW UNIBODY MBP'S

I hope that clears things up! ;)
 
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