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MEMORY DIMMS INSTALLED-DONT SHOW IN "ABOUT THIS MAC"

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DICKNPHYL

macrumors member
Original poster
WHEN I CK "ABOUT THIS MAC" IT SHOWS I HAVE ONLY THE 4 GB MHZ DDR2 FB-DIMM. IN DIMM RISER 3. I ACTUALLY HAVE 8 MORE GB'S 4 IN RISER "B" AND 4GBS IN RISER "A". CAN ANYONE TELL ME WHAT IS GOING ON AND HOW TO CORRECT IT.
THANKS-
DICKSTER-----
 
What Mac do you have and what RAM are you trying to install? You could also try re-seating the RAM as sometimes they're not fitted properly. They have to be pretty snug.
 
HAVE A MAC PRO WORK STATION-USING YOSEMITE 10.10.4- THE MEMORY DIMMS WERE ALREADY INSTALLED AND ALL WAS WORKING WELL. I AM GOING TO DOWNLOAD AND RE-INSTALL YOSEMITE TODAY AND SEE IF THAT IS THE FIX FOR IT. I DID IT A COUPLE DAYS AGO BECAUSE OF MINOR PROBS. THEN I WILL PULL THE ACTUAL DIMMS AND RESEAT THEM AND SEE IF THAT WORKS.
THANKS-DICKSTER-----
 
Can you please stop typing in CAPS? It's making my eyes bleed. Just try re-seating the RAM first.
 
\-V-/ said:
Can you please stop typing in CAPS? It's making my eyes bleed. Just try re-seating the RAM first.
Click to expand...
sorry about the "caps"---reinstalled yosemite os 10.10.4 and it did nothing. will try reseatingthe dims later today.
dickster-----
 
DICKNPHYL said:
sorry about the "caps"---reinstalled yosemite os 10.10.4 and it did nothing. will try reseatingthe dims later today.
dickster-----
Click to expand...
Reset the DIMMS in computer double ckd. them but it made no change; still not showing the ram dims in about this Mac. I'm now wondering if I am operating with only the 4 gb's it shows.
Any other ideas?
Dickster
 
You are either on a Mac Pro 1,1, MacPro 2,1 (667MHz) or 3,1 (800MHz) DDR-2 FB DIMMS

This question is better asked in the Mac Pro forums btw.

I had this issue, i resolved it by swapping the Dimm Module trays around (not just modules, the actual memory boards that inserts to the logic board) , from top to bottom and vice versa.
Also have a look when you boot it up for any red LEDs that light up and stay on.

Also installation of DIMMs require proper procedures based on the Mac Pro model you have, identify that first then follow this:

https://support.apple.com/en-au/HT4433
 
Icarus; I found I did have some red flashing lights. I went into Apple menu-about this Mac- System report-- diagnostics- It told me I had memory failure in 3 of my memory card dims. 1-4gb and both 1gb cards. I called the co. I had purchased the 2-4gbs from. they had LIFETIME WARRANTY "MEMORYAMERICA.COM" They sent me the 8 gb memory cards. Got them Sat. Installed and did take out the 2-1gb Apple card-8yrs. Old, no warranty.
Now I have 8 gb's Ram instead of 10; every thing is working great, just like when new.
Thanks for your help and to you others also !
Dickster-----
 
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