David Mahony

Q: Mac Pro 3.1 not booting after ram install

Hi Everyone,

 

Before my troubles started I had 2x2gb in riser board A and 2x2gb in riser board B and everything was working fine.

However today I came to install 2 new 4gb modules by placing them into slots 1 & 2 of riser B and placing the 4x2gb modules into riser B and now it's all gone horribly wrong!

 

When I turned on my mac the fans went into overdrive but i still managed to get into my account but could only see 8gb of the 16gb installed.

I then shut down took out the new 4gb modules put back everything back as before and restarted but this time it powered up but there wasn't even a boot sequence!

 

I've tried switching the boards around and even tried an SMC reset but all to no avail  .

 

I'm totally stuck and not sure what to do next can anyone please help?

OS X El Capitan (10.11.3), Nvidia Geforce GTX 670 • BenQ FP241W

Posted on Oct 6, 2016 9:51 AM

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