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Modelle A1181 / 1,83, 2, 2,1, 2,16, 2,2, or 2,4 GHz Core 2 Duo Prozessor

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MB doesn't turn on after RAM upgrade

I am trying to change/upgrade the RAM of a MacBook 2.4GHz Intel Core 2 Duo from the original 2GB (2x1GB) to 4GB (2x2GB).

The new RAM I bought are Corsair 2GB DDR2 800Mhz .

Now, the Mac with the new 4GB of RAM doesn't boot up (nothing, apart the light display on the corner down on the right).

If I keep 1x1GB (original) and 1x2GB (new) it boots up (since I tried all the combinations, all the RAM works fine).

Any Idea? Thank you

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Let's first correctly identify your machine as there were 2008 & 2010 models of the 2.4 C2D machines.

von

Hi Mayer, thank you!

it is a 2008 (is 2242 Model, http://www.everymac.com/systems/apple/ma... )

von

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Try another brand. I've had Mac compatibility issues with Corsair personally. I switched to Kingston and Crucial, and haven't had any issues.

Also the speed absolutely has to match. Any faster it likely won't boot.

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if is that the right model, you need pair of 667 MHz DDR2 SDRAM (PC2-5300)

of course both 800 Mhz didn't work, nice try:))

good luck

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I was afraid, it could have been that...I will try with 667MHz.

Thank you!

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The RAM you are trying to use is incompatible with your model . You are trying to use 800 MHz RAM when that model only supports 667 MHz (PC2-5300). The reason why it works when you use the new ram in combo with old RAM, is that the old RAM is compatible. I am willing to bet if you looked in system specs, the Motherboard would only see your old RAM.

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Well, in the System specs I can see both, the new one and the old RAM (but it maybe doesn't support both 800MHz RAM .

Thanks!

von

RAM Type: PC2-5300 DDR2 Min. RAM Speed: 667 MHz

Details: Supports 667 MHz PC2-5300 DDR2 SDRAM.

Standard RAM: 2 GB Maximum RAM: 6 GB*

von

Thank you, Mayer

von

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luthdo wird auf ewig dankbar sein.
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