Problem Adding Ram - no boot with 4GB installed.

I am trying to upgrade a macbookpro4, 1 (early 2008). I got it to see 3GB (one 2GB SODIMM and one 1GB SODIMM) but it won't boot with two 2 GB SODIMMs installed. They are PNY DDR-2 PC2-6400 (compatible with 800 MHz, 633 MHz & 533 MHz). (It is not a problem with either So-Dimm or withseatign in slot because system will recognize the 2GB sodimm in either slot and will recognize either of the two 2GB sodimms I am tryonmg tuo install; problem is definitely with the system itself -- it will only recognize one 2GB sodimm when it is with one 1GB sodimm, not with the other 2GB sodimm.) Is there some deep system setting that I don't know about to allow all 4GB to be seen?

Read here:
https://discussions.apple.com/message/18128725#18128725#18128725
Then return the PNY RAM for a refund.
Buy here:
http://www.macsales.com/
Or here:
http://www.crucial.com/

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Greetings!
This thread is little related to: https://forum-en.msi.com/index.php?topic=110095.0
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Quote from: NovJoe on 07-August-07, 10:18:34
If I understand correctly, you are saying that you can install Vista and XP to the system but not able to boot into the OS'es when you have 4GB of RAMs installed?
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While we all have MacBooks in this forum not all of us use BootCamp. There's a BootCamp Support Community where everybody uses BootCamp. You should also post this question there to increase your chances of getting an answer.
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Run memtest with all 4 dimms installed - Since it's valueram there's a chanse those sticks are not identical. They just use the cheapest chips they can find at the time to produce valueram, so even if you buy valueram from the same make and type, but at a diffirent time, they might still use diffirent chips ...
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Thanks
Edited by: MavenDev on Oct 30, 2011 8:08 PM

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Looking for some help.
I recently purchased an HP Pavilion 500-314. Specs are as follows:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c04293928&tmp_task=prodinfoCategory&cc=us&dlc=en...
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VisionTek 900345 Radeon HD 5570 1GB DDR3 PCI Express 2.0 x16
This question was solved.
View Solution.

lordmonk3y,
Both the ATI Firepro 2450 (which never worked properly, but the system did recognize and was able to boot with when installed) and the GeForce GT 610 claim to draw right around 30w peak (closer to 20w average). Both are considered to be relatively low-draw graphics cards, and neither is a standout performer. My work requires a lot of available screen space, but not a lot of graphics horsepower. I don't do any gaming. For heavier hitting graphics cards you might want to consider a bigger power supply. Based on most of what I looked at, 300w is the bare minimum for a lot of these cards, and many of them require a larger power supply.
For what it's worth, I looked at the specs listed on the side of the PS in the 500-314, and it actually claims peak power of 300w, but only 250w at higher operating temperatures. It's kind of a catch-22, because if you're running a more powerful card it's sure to generate more heat inside the tower, thereby lowering the available power from the PS.
I did notice that there's one other nice thing about using an external card. The onboard Radeon R7 grabbed 1GB of the stated 8GB system memory for itself, thereby leaving only 7GB free for system use. Now that I'm using an external card, I get the whole 8GB available for system use.

Problem Adding Ram - no boot with 4GB installed.

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