MacBook wont boot after RAM change

Question

MacBook Core 2 Duo

Model A1181: 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

1203 Soru Tümünü görüntüle

Juan David @juandavid21342

İtibar: 1

1

Gönderildi: 23 Mar 2012

Seçenekler

MacBook wont boot after RAM change

I bought a pair of 4GB Crucial DDR3 - 1333 (PC3 10600) ram memory, I installed it but when I turn on my Mac, it doesnt start, the screen is black and emits a beep. I tried changing positions, but nothing, when I mixed one crucial and one stock ram memory, boots normally, tried with both sticks and starts normally, but Im losing 3gb of memory, what do you recommend me?

PD: Sorry for my english, Im not a native speaker.

PD2: Its a unibody MacBook White 13" mid 2010 with OS X Lion 10.7.3

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Evet Hayır

Puan -1

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Seçilen Çözüm

mayer @mayer

İtibar: 685,3b

MacHale Enterprises

3,4b

1,1b

2,6b

Gönderildi: 23 Mar 2012

Seçenekler

Your machine uses PC3-8500 DDR3 Min. RAM Speed: 1066 MHz

It appears you have gotten RAM that's to fast for your machine.

http://www.everymac.com/systems/apple/ma...

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Puan 5

7 Yorum:

thankyou, but why one ram works but not the two, shouldnt both or none work?

Juan David tarafından 24 Mar 2012

The RAM bus is now independent of the CPU FSB (front side bus). The RAM bus speed is determined by the slowest chip/stick installed and the crystal setting the bus pace. Thus it makes perfect sense for both old chips to work and/or 1 new with 1 old, but not both new chips of the wrong speed to work. On most modern computers the memory controller has moved off the Northbridge.

ABCellars tarafından 24 Mar 2012

I guess I can sell a friend the other one, but, there's no problem using just one and one?, I mean, In mot going to nave any problems by using one 1333 and one 1066?

Juan David tarafından 25 Mar 2012

I would sell both new chips and purchase 2 of the correct speed. You will get better performance out of your system.

ABCellars tarafından 25 Mar 2012

I cant return it, it was a gift from a friend in the usa, Im in southamerica, It wont get unstable if I left one and one?, sorry for insisting

Juan David tarafından 25 Mar 2012

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thankyou, but why one ram works but not the two, shouldnt both or none work? — Juan David
The RAM bus is now independent of the CPU FSB (front side bus). The RAM bus speed is determined by the slowest chip/stick installed and the crystal setting the bus pace. Thus it makes perfect sense for both old chips to work and/or 1 new with 1 old, but not both new chips of the wrong speed to work. On most modern computers the memory controller has moved off the Northbridge. — ABCellars
I guess I can sell a friend the other one, but, there's no problem using just one and one?, I mean, In mot going to nave any problems by using one 1333 and one 1066? — Juan David
I would sell both new chips and purchase 2 of the correct speed. You will get better performance out of your system. — ABCellars
I cant return it, it was a gift from a friend in the usa, Im in southamerica, It wont get unstable if I left one and one?, sorry for insisting — Juan David

MacBook Core 2 Duo

MacBook wont boot after RAM change

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