I bought a 4GB card so that would be two stock and the one I bought. 3 total. Where can I find the 'carrier' thing the actuall card slips into?
Do I have to have 4 or can I run 3? thanks for any help.
your question leaves me wondering what you are talking about and type of memory for what Mac model.
RE: Mac Pro 65 lb tower computers ONLY:
Mac Pro uses ECC memory 72 bits wide. Apple-specified Heatsink and temperature-reporting chip is REQUIRED, and is especially necessary for denser modules.
2008 and previous: Uses dual-channel. Matched pairs are required, all slots populated is optimum. (less than all populated is slightly slower). DIMMs are plugged into Riser cards. All the riser cards you will ever need should have shipped in your Mac.
2009 and later: Triple-channel memory is used. Modules in slot 3 and 4 (on each side, if dual processor chips) are shared. Three DIMMs is optimum, two is an estimated five percent slower, four is a little more than five percent slower, but more than compensated by having more RAM available. Largest DIMMs go in the lowest-numbered slots (towards the door in the first set). No riser card is used -- the processor(s) and RAM is on a large daughter card (on its own removable shelf).
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The way you asked your question makes me think you probably have a great new replacement memory that is working perfectly, but is the wrong memory for your Mac.
If you deal only with Vendors who know Macs, you tell them your model and they send you the proper RAM and the proper number of modules for your proposed expansion, "Guaranteed to work in your Mac or your money back!"
Hi there. thanks for the response. I have a 2008 and previous. below is my info. So I guess I would have to buy another card to make four? I don't remember getting any extra riser cards. I only have the two that are in there now. I have the two memory trays. the top is upside down (pic attached). I bought the memory from macmall and spoke with a rep to make sure it would work. Looks like it should but haven't tried yet.
Thanks again.
Model Name: Mac Pro
Model Identifier: MacPro1,1
Processor Name: Dual-Core Intel Xeon
Processor Speed: 2.66 GHz
Number Of Processors: 2
Total Number Of Cores: 4
L2 Cache (per processor): 4 MB
Memory: 1 GB
Bus Speed: 1.33 GHz
Boot ROM Version: MP11.005C.B08
SMC Version (system): 1.7f10
Serial Number (system): YMXXXXXXXQ2
Hardware UUID: 00000000-0000-1000-8000-0017F2050F8E
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http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/
Those are what I use, they are $54 the kit, and ideal would be two kits, 8GB (one set on top, one set below).
Those are Risers and hold 4 DIMMs each for total of 8 and up to 32GB (4GB FBDIMMs cost a lot more).
WD Black 1TB $99
apple recommends installing ram sticks in matching pairs,be sure to degauss and seat the sticks securley...gerry tt
the manual states that ram should installed in equal and matching pairs,your serial number is required when purchasing...gerry t&t
Never post or give out the serieal number: it is not needed or wanted. the Mac model ID is more than enough. And why yours was X'd out.
when installing memory do you have to have an even number of cards to run parallel?
