cMP & nMP {MacPro 4,1 & 5,1} Memory Upgrade Compatibility and FAQ

here start mega thread of memory upgrades , faq

please feel free post working configurations along brand , model numbers.


single w36xx cpu can support 56gb memory (3x16 + 8)
single x56xx cpu can support 64gb memory (4x16)
dual x56xx cpu can support 160gb memory (5x32)

**currently there no confirmation if 32gb dimms can used on single processor cmp further push memory size limit.**


apple's recommendation:

• pc3-10600e, 1333 mhz, ddr3 sdram udimms
• error-correcting code (ecc)
• 72-bit wide, 240-pin ecc modules
• 36 ics maximum per ecc udimm

mac pro can accept slower memory. run slower.

mac pro can accept faster memory, dimm automatically downclock match cpu / logicboard's max possible speed.

there no requirement use ecc ram on cmp.

memory specifications differ between 4,1 , 5,1

dimm supported model numbers (cmp 5,1)
- users have reported normal non-ecc dimms work
<links , additional info needed>

udimm supported model numbers (cmp 5,1)
- apple's recommended ram spec

where buy:
macsales
ebay
newegg
amazon

brands , model numbers:

crucial
ct8g3w186dm
ct16g3w186dm

kingston

samsung
m391b5273ch0-ch9

hynix

elpida
​

rdimm supported model numbers (cmp 5,1)
- yes rdimms work cannot mix udimms
- perfomance differential nominal

where buy:
ebay
amazon
newegg

brands , model numbers:

hynix
-- 8gb --
hmt31gr7bfr4c-h9 d7 ab

samsung
-- 8gb --
m393b1k70ch0-ch9

micron
-- 8gb --
mt36jszf1g72pz-1g4d1dd
-- 16gb --
mt36ksf2g72pz-1g4

elpida
-- 8gb --
ebj81rf4ecfa-dj-f​

 

afaik, ram specifications same between 4,1 , 5,1 cmp. when 4,1 upgraded 5,1 firmware 4,1 can use faster , more cores cpus.

memory suppliers, avoid ebay , macsales (owc) @ costs. many ebay sellers sell counterfeit equipment , owcs memory has proven suspect.

ram supplier since 1986, has been:

https://www.datamemorysystems.com/apple-memory/

guarantee life. mac specialists. in years have been dealing them, have never received bad piece of equipment. recommend them highly.

lou

 

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