The Mac Pro First Generation is an Intel Xeon-based workstation computer manufactured by Apple Inc. between the years of 2006 and 2013.

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4 slots with 4gb of ram and 4 of 1gb?

I HAVE A MacPro Quad Core 2.66 GHz Model ID MacPro 4.1

IS IT POSSIBLE TO PUT 4 MODULES OF 4GB and 4 MODULES OF 1 GB?

I'VE BOUGHT 4 MODULES OF 4GB, BUT I'VE STILL HAVE THE MEMORY THAT CAME WITH MY MACPRO AND I'WOULD LIKE TO USE IT!

THANKS

Update

Finally, my configuration is:

1 and 2, 4 GB

5 and 6, 4 GB

3 and 4, 1 GB

7 and 8, 1 GB

Everything works perfect and now I have 20 GB RAM. Thanks a lot!

Answered! View the answer I have this problem too

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Chosen Solution

It should say the right pair combo on the computer's documentation.

Otherwise this would be my winning combo:

BAY1:

1GIG

1GIG

4GIG

4GIG

BAY2:

1GIG

1GIG

4GIG

4GIG

Mac Pro FB-DIMMs

The Mac Pro Xeon machines use FB-DIMMs. They are installed in pairs. The machine has 2 riser cards that take the RAM, each card has 4 sockets. You populate the RAM in pairs, with the largest RAM in the numerically lowest slots -- in this order:

A1 A2

B1 B2

A3 A4

B3 B4

The sockets 3 and 4 have a higher latency than sockets 1 and 2, so put your largest RAM in the 1 and 2 sockets.

There is a small speed benefit to installing 4 identical modules across both risers: A1 A2 B1 B2 which permits 256-bit access mode. However, do not buy smaller RAM modules just to match an existing pair.

There is a diagram on the inside of 2007 Mac Pros to help identify installation order. Newer Mac Pros have a diagram inside directing you to see the User Manual for installation instructions, instead.

The 2008 Penryn MacPros deliver with RAM in A1 B1. This must be changed if you are adding RAM. If you are adding one pair, put the new RAM in A1 A2 and relocate the Apple RAM to B1 B2.

Hope this helps,

Fred

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Thank you very much.

When I receive my new RAM (I hope in 5 days), I will try what you suggest and then I'll comment my conclusion.

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I have had no luck mixing RAM chips on the Mac Pro. I would forget the 1 meg chips.

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Finally, my configuration is:

1 and 2, 4 GB

5 and 6, 4 GB

3 and 4, 1 GB

7 and 8, 1 GB

Everything works perfect and now I have 20 GB RAM

Thanks a lot!

by

Add a comment

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Yamila will be eternally grateful.
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