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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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Ram upgrade not working in one slot

Hi there,

I have a late 2007 white MacBook Core 2 Duo 2Ghz. It came with 1 GB of ram as standard and I want to upgrade to 2GB. However when I insert the 2 x 1GB chips the MacBook does not boot up, I do not even get the chime. The screen is blank, but the sleep light is showing a solid white light. I have tried resetting the PRAM with no effect. I have tried chips from both Kingston and Crucial with the same effect. With a bit of messing about, I have found that Slot/Bank 0 will only take up to 512MB whilst Slot/Bank 1 will accept 512MB and 1GB. No matter what chips I try in Slot/Bank 0 the computer only boots if there is nothing or 512MB in it. As soon as I install a 1GB chip the computer fails to boot. Is there any way to fix this problem and if so what needs to be changed. Thank you.

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According to Apple your unit should take 4 GB. You have I'm afraid a logic board problem of some type. You also state you wanted to upgrade to 2 GB. You could install a 2 Gb in the good slot and the 512 MB in the other for 2.5GB. Ralph

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Are you sure about the 4GB Ralph? My source is showing only 2 GB max.

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Looking further the OP said late 2007 which I quoted. However the same Model A1181 from mid-2007 list 2 GB max. I think it boils down to which model the OP has. If the mid 2007 you are correct and the max is 2GB---if the late 2007 my 4 GB stands. I leave it to him to know what he owns. If the older he can still have 1.5 GB. Ralph

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Agreed, it should run just fine with 1.5 GIGs. +

von

Thanks for your help guys. Mayer, yes it runs fine with 1.5Gb. I have just double checked the spec of my machine and it is a late 2006, not 2007, so I think 2Gb is the max. If I want to run the full 2Gb is my only option to replace the logic board?

von

Just to close this out. Since OSX Lion required 2GB RAM, I looked into this further. I found that my MacBook actually unofficially supported 3Gb. Based on this I ordered a 2GB stick and used it with my original 512kb stick. So I now have 2.5Gb and it is working lovely with OSX Lion.

Cheers,

Keith.

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If you really have a LATE 2007 model, then it can take up to 6 GB. The only thing is that it has to be memory modules that have the 667 MHz in SPD. At least one of them. Not sure if it has to be in the first slot. I'm runing 5 GB currently, 4GB 800MHz module and 1 GB 667 MHz module.

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keithellis wird auf ewig dankbar sein.
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