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macpro 1.1 (2.1) 2x8 or 8x2GB PC2-5300x 667mhz Ram combinations

Mac Pro - MacRumors Forums - forums.macrumors.com
hello,

I want to buy 16GB RAMfor my 2006, 1.1 (2.1) MP DC device, with 8GB ram (in all risers)

so i can install ElCapitan.

I found some ads, selling either 2 DIMMSx8GB or 8 DIMMSx 2GB, PC2-5300x 667mhz RAM.

Which one is best and possibly work faster, or it does not matter at all...

What the term i.e. 2Rx4 means ?

What is difference from 5300G, 5300F ram. Can xxxxG and xxxxF RAM work ok on my mac?

Further machine info is:

Kernel version= darwin 11.4.2, with secure virtual memory

dual core xeon 80486, 2.66Ghz.

Bus speed 1.33 ghz, SMC 1.7f10

Riser card s/n 922-7695

FB DIMMS 1GB 661-3930, FB DIMMS 2GB 661-3931

manual says i need RAM @ 667mhz, fbdimm, 240pin ECC,

36 devices max per dimm. not sure if needs FB or unbuffered.

 


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