MacBook Pro Late 2010, Model 7,1 Error in Upgrading to 8 GB RAM

Question

MacBook Pro Late 2010, Model 7,1 Error in Upgrading to 8 GB RAM

I've been trying to upgrade my RAM to 8 GB from the 4 GB on my MacBook Pro Model 7,1, late 2010.

My 4 GB runs smoothly; I can get 6 GB to run smoothly, switching 4 GB PNY to banks 0 or 1 without a problem.

All memory tests good in either bank.

When both 4 GB RAM modules are inserted, the MacBook Pro hangs a few seconds after the gear starts turning on start-up.

I have now tried two pair of 4 GB RAM modules. Same results every time.

I am running all the OS updates from Apple using OS 10.6.8. I am now running 6 GB RAM without a hitch. Any suggestions on how to get both 4 GB RAM modules to work together so that I'll have the advantages of the full 8 GBytes?

TIA

Jeff

(P.S. Search of pasts posts not helpful.)

MacBook Pro, Mac OS X (10.6.8)

Posted on Apr 17, 2012 9:16 AM

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Answer 1

kostby

Level 4

2,940 points

Apr 17, 2012 10:51 AM in response to jeffreyMJacques

Welcome to Apple Support Communities.

Not trying to be redundant about things you've already tried, but you didn't mention it, so I'll offer this:

Have you tried a PRAM after installing both 4GB modules?

I had a similar problem with a RAM upgrade in a 2009 MacBook Pro.

Once PRAM was reset at power-on (hold down Command-Option-P-R and wait for it to reboot twice before releasing the keys) it worked.

An SMC reset wouldn't seem to be related to RAM, but it doesn't hurt anything to try:

http://support.apple.com/kb/HT3964

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Answer 2

wjosten

Level 10

95,321 points

Apr 17, 2012 11:24 AM in response to jeffreyMJacques

Return the PNY RAM for a refund & purchase from either Crucial or OWC. Users have reported problems with PNY for years:

https://discussions.apple.com/thread/3876458?answerId=18128725022#18128725022

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