Installing 6Gb or 8Gb ram

Hello,

I have a Macbook Pro 15" 2,5GHz (early 2008), model identifier MacBookPro4,1 model number A1260.

I currently have 2Gb of RAM installed in a 1+1Gb configuration.

I would like to upgrade to at least 4Gb, but I have read around the web that someone was able to upgrade up to 6 or 8gb:

Why is the maximum amount of ram available only 6Gb?

In this topic is reported a firmware upgrade that would enable the A1260 to accept up to 8gb.

Is it correct? has anyone tried (and succeeded) to do so?

If not what are my upgrade options?

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Thanks for posting a link to my previous answer on this question. If you read the link to the OWC finding, I don't understand what the question is, it pretty well address the issue. And yes, I have 8 GB of RAM working in my MacBook Pro 2.53. But you must have one of the affected models for this to work:

MacBook 13.3″ 2.0GHz and 2.4GHz

MacBook Pro 15″ 2.4GHz (All)

MacBook Pro 15″ 2.53GHz model w/ExpressCard Slot (Late 2008)

MacBook Pro 15″ 2.8GHz model w/ExpressCard Slot (Late 2008)

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Hi Mayer I have read the link but my question is that my macbook pro is NOT an unibody (ie: MacBookPro5,1 ) which is the kind of macbook pro mentioned in the article.

Thus the said firmware upgrade does not apply to MBP 4,1.

These are my current firmware versions..:(

Boot ROM Version: MBP41.00C1.B03

SMC Version: 1.27f3

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You're going to have to live with 6 GB maximum. Apple officially supports a maximum of 4 GB of RAM but third-parties have been able to upgrade the system to 6 GB of RAM using one 2 GB and one 4 GB memory module.

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for your machine, i cannot find any trace of proof of it working with more then 6 GB of RAM. the next model up, the late 08 macbook pro, will work with 8 GB of RAM using that firmware.

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