It might be only reading one card if not fitted correctly, or
*How to you ensure your MacBook Pro can address 8GB of RAM*
Check the Boot ROM Version in your System Profiler at this link:
MacBook Pros with a Model ID of MacBookPro5,1 should have a Boot ROM Version of MBP51.007E.B05.
If your Boot ROM version does not match the numbers above, download and update the Firmware:
MacBook Pro EFI Firmware Update 1.8 (Apple.com Download)
Once you have ensured that the Boot ROM is the correct version, make sure your Operating System is updated to Mac OS X v10.6.6. You must be running Snow Leopard to address 8GB on these systems.
Hi s, and welcome to Apple Discussions.
Open System Profiler > Memory and see which module/bank is being read.
Try swapping RAM: remove one module, try booting, move that module to the other slot, try booting, repeat with other module. This should identify whether one of the modules or one of the slots is bad.
It looks like you have the same specs as me regarding your MBP 15" (2.4 ghz/ OS X 10.6.7/ early '08 model); I would like to install 8GB RAM like you and was wondering if your computer recognizes the full 8gb. I've read places that my processor had to be at least 2.6ghz in order to "see" all 8gb. Did it work for you, if so what kind of RAM did you install?
Glad to here that I am not the only one stuck with this issue. I have recently invested in a new macbook pro with ssd disk and 4 GB 1067 MHz DDR3.
Only reason why i got this one was because I thought i could upgrade to 8 GB ram. However, with the 8GB ram installed (kingston by the way which i know is compatable because I have it on my other macbook pro). Nevertheless, when installed. I notice it only recognizes 4 GB of the 8 GB installed.
I have also tried resetting PRAM, along with trying server different RAM combinations but i still only recognizes 4 GB. It's as if I am running a windows pc with 32-bit system, which only support 3.7 GB RAM.
In short, I was wondering if any of you have solved this issue??? Considering the post is quite old.
Thanks for any advice / ideas.
Hope to hear from anyone shortly!
Thanks for the input iVmicael. Found some cheap RAM from other seller with the exact same RAM specs as the ones sold from apple stores. Will see if i get them later and check that out, dont really want to spend three times the prices on RAM, even though its the same hardware.
Love apple, but hardware should still be the same.
I will re-post later once I know what happens