MP All Models Mac Pro RAM Compatibility List

[MisterAndrew]

Mac Pro RAM Compatibility List

This thread has information on the specifications of RAM for the Mac Pro models to help you determine compatibility. This is a Wiki post so anyone with the appropriate permissions may edit it. Please help others in the community by adding compatible RAM and fixing errors. Please double check with reliable sources before making corrections.


Mac Pro 7,1 (2019)

Specification:
2933MHz DDR4 ECC DIMM memory (288-pin). May be RDIMM (registered) or LRDIMM (load reduced), but cannot be mixed. RDIMM capacities can be mixed (6 of each), but LRDIMMs must all be the same capacity. 3200MHz memory can be used, but is down-clocked based on CPU. RAM speed is reduced to 2666 MHz with 8 core processor.

Number of memory slots:
12

Maximum RAM:
1 TB or 2 TB (24-core or 28-core processor)

Mac Pro (2019) memory specifications:

Mac Pro (2019) memory specifications - Apple Support

Learn about the types of memory (RAM) used in Mac Pro (2019).

support.apple.com

Install and replace memory in your Mac Pro (2019) - Apple Support

Learn how to remove and install memory in your Mac Pro.

support.apple.com

Original modules:

8 GB RDIMM: 1Rx8

SK hynix HMA81GR7CJR8N-WM

16 GB RDIMM: 1Rx4

Micron MTA18ASF2G72PZ-2G9E6TK

32 GB RDIMM:

64 GB LRDIMM: 4DRx4

SK hynix HMAA8GL7CPR4N-WM

128 GB LRDIMM



Mac Pro 6,1 (Late 2013)

Specification:
1866 MHz DDR3 ECC SDRAM memory (240-pin). May be Unbuffered (UDIMM) or Registered (RDIMM), but cannot be mixed.

Number of memory slots:
4

Maximum RAM:
128 GB

Mac Pro (Late 2013) memory specifications:

Mac Pro (Late 2013) - Technical Specifications - Apple Support

support.apple.com

Original modules:

4GB DIMM

8GB DIMM

16 GB DIMM



Mac Pro 4,1 & 5,1 (Early 2009, Mid 2010, & Mid 2012)

Specification:
1066 MHz or 1333 MHz DDR3 ECC SDRAM memory (240-pin). May be Unbuffered (UDIMM) or Registered (RDIMM), but cannot be mixed.

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
4 (single processor) or 8 (dual processor)

Maximum RAM:
96 GB (single processor) or 256 GB (dual processor)

Original modules:

1 GB DIMM

2 GB DIMM

4 GB DIMM

8 GB DIMM (5,1)



Mac Pro 3,1 (Early 2008)

Specification:
800 MHz DDR2 ECC "fully-buffered" FB-DIMM memory (240-pin)

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
8

Maximum RAM:
64 GB

Original modules:

1 GB FB-DIMM

2 GB FB-DIMM

4 GB FB-DIMM



Mac Pro 1,1 & 2,1 (2006 & 2007)

Specification:
667 MHz DDR2 ECC "fully-buffered" FB-DIMM memory (240-pin)

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
8

Maximum RAM:
32 GB

Original modules:

512 MB FB-DIMM

1 GB FB-DIMM

2 GB FB-DIMM

 

[MisterAndrew]

People were asking for a Wiki post they can all contribute to, so I took the initiative, but I guess it hasn't done any good because people are just making their own and asking the same questions. We'll just have to be messy I guess.

 

[bsbeamer]

OWC is reporting that 1TB of RAM is possible in 8, 12, and 16 core MP7,1 machines via 8 x 128.0GB PC23400 2933MHz DDR4 LRDIMM modules, at nearly $14K for their modules for this upgrade, which is around $1750/module.

For comparison purposes, they sell 768GB via 12 x 64.0GB PC23400 2933MHz DDR4 LRDIMM for $4900, which is around $408/module. For reference, same spec Samsung 64GB modules typically sell for ~$300/module right now.

 

[arock]

That is probably true given that 1TB is the upper limit for those CPUs. However, at 8 DIMMs you're only using 4 channels out of the 6, so it will carry a perf penalty. I guess that's why Apple would suggest 768GB as the max since you can get there with 12x64GB or 6x128GB and fully utilize the 6 channels with either config.

 

[bsbeamer]

Penalty or not, outrageous cost or not, 1TB apparently is compatible. Those are details worth mentioning with a big * next to 1TB compatible with MP7,1 in this list for whomever is keeping track.

 

[MisterAndrew]

Could it be possible that 256 GB DIMMs could be used to reach 2 TB for the 24 & 28 core models?

Such as this one: https://www.serversupply.com/MEMORY/PC4-23400/256GB/SAMSUNG/M386ABG40M5B-CYF.htm

 

[bsbeamer]

Could it be possible then that eight 256 GB DIMMs could be used to reach 2 TB for the 24 & 28 core models? (Or eight 128 GB DIMMs + four 256 GB DIMMs)

Such as this one: https://www.serversupply.com/MEMORY/PC4-23400/256GB/SAMSUNG/M386ABG40M5B-CYF.htm

According to this report:

Intel Cascade Lake Xeon W-3200 Launched: Server Socket, 64 PCIe 3.0 lanes

www.anandtech.com

“2 TiB means 8 x 128 GiB + 4 x 256 GiB.”

 

[MisterAndrew]

Here's a Supermicro motherboard with 12 DIMM slots and the same chipset, so it must be possible on the Mac Pro.

X11SPA-T | Motherboards | Products | Supermicro

 

[bsbeamer]

That one states up to 3TB in specs:

Up to 3TB 3DS ECC RDIMM, DDR4-2933MHz; Up to 2TB 3DS ECC LRDIMM, DDR4-2933MHz
Or 3TB DCPMM, DDR4-2666MHz, in 12 DIMM slots

...but current processors do not support 3TB. Maybe MP7,1 is future proof in that sense?

Maybe time to reevaluate my life if I could personally afford (and justify) 3TB of RAM in 2020.

 

[MisterAndrew]

Some of the very expensive Scalable Xeons support 3 TB of RAM. I think they are all fairly low speed processors though.

Here's one of them, the 18 core Xeon Gold 6240L, which supports 4.5 TB of RAM.

Xeon Gold 6240L - Intel - WikiChip

Xeon Gold 6240L is a 64-bit 18-core x86 high performance server microprocessor introduced by Intel in early 2019. The Gold 6240L is based on the Cascade Lake microarchitecture and is manufactured on a 14 nm process. This chip supports 4-way multiprocessing, sports 2 AVX-512 FMA units as well as...

en.wikichip.org

 

[Alexis Noel]

Has anyone tried using the stock MP 6,1 RAM on the MP 5,1? Will it auto-underclock to work correctly?

 

[MisterAndrew]

Has anyone tried using the stock MP 6,1 RAM on the MP 5,1? Will it auto-underclock to work correctly?

Yes, 6,1 RAM works fine in the 5,1.

 

[Henninges]

what about "load reduced" ddr3 sticks in an 6,1 ?
does it work ?

 

[MisterAndrew]

what about "load reduced" ddr3 sticks in an 6,1 ?
does it work ?

Nope. I think the 12 core model (2600 v2 series CPU) can use them theoretically, but it looks like Apple hasn't enabled support in the firmware, unless that's changed. The 1600 v2 series CPUs don't support LR dimms.

 

[villacio1]

Hi
I recently bought a 2010 5,1 2.8GHz Single CPU with 3x2GB Hynix PC3-10600E-9-10-E0
And yesterday I saw on sale a OWC Model OWC1333D3MPE32G of 32GB card for a good price, but it seems that it corresponds to a Mac 6,1
Will it work fine on my Mac? I plan to upgrade de CPU tray to a Dual CPU in the future.

 

[tsialex]

Hi
I recently bought a 2010 5,1 2.8GHz Single CPU with 3x2GB Hynix PC3-10600E-9-10-E0
And yesterday I saw on sale a OWC Model OWC1333D3MPE32G of 32GB card for a good price, but it seems that it corresponds to a Mac 6,1
Will it work fine on my Mac? I plan to upgrade de CPU tray to a Dual CPU in the future.

Early-2009 to mid-2012 Mac Pros require dual rank memory. Most times quad rank memory don't work at all or work at 800MHz.

This OWC memory is quad rank, don't buy it.

 

[syncom]

How exactly does the "Apple Qualified Thermal Sensor EEPROM" work? Is it also present on other third-party RAM memories as well as on OWC's RAM? How to tell if it is present and works normally?

 

[cu29]

How exactly does the "Apple Qualified Thermal Sensor EEPROM" work? Is it also present on other third-party RAM memories as well as on OWC's RAM? How to tell if it is present and works normally?

I've been following this topic for a few years. Nobody seems to know. I did read a white paper document that Samsung put out for the 1066/1333/1600 memory sticks. It mentioned having a thermal sensor on the product. I'm thinking the whole EPROM thing is just Apple marketing. My guess is that all the certified memory sticks on the 240-pin format have it. If it say certified by Jwin or Jdec, something like one of those four letter words, then it has the thermal sensor.

 

[MisterAndrew]

It’s been a few years since I’ve made this thread. I’m still curious if anyone has tried 256GB modules in the 7,1 such as the one below. Of course to get 8 of them to reach the theoretical 2TB maximum it would cost nearly $20k.

Hynix HMAT14JXSRB120N 256GB DDR4-3200MHz PC4-25600 ECC Registered CL22 288-Pin RDIMM 1.2V Octal Rank Memory Module. BULK. IN STOCK.

Supplying computer parts on Demand. Trusted Source for all your Hardware needs. We ensure Quality Products with Warranty. Free ground shipping- AA2ZSupply.com

www.aa2zsupply.com

 

[farikatik]

Mac Pro RAM Compatibility List

This thread has information on the specifications of RAM for the Mac Pro models to help you determine compatibility. This is a Wiki post so anyone with the appropriate permissions may edit it. Please help others in the community by adding compatible RAM and fixing errors. Please double check with reliable sources before making corrections.


Mac Pro 7,1 (2019)

Specification:
2933MHz DDR4 ECC DIMM memory (288-pin). May be RDIMM (registered) or LRDIMM (load reduced), but cannot be mixed. RDIMM capacities can be mixed (6 of each), but LRDIMMs must all be the same capacity. 3200MHz memory can be used, but is down-clocked based on CPU. RAM speed is reduced to 2666 MHz with 8 core processor.

Number of memory slots:
12

Maximum RAM:
1 TB or 2 TB (24-core or 28-core processor)

Mac Pro (2019) memory specifications:

Mac Pro (2019) memory specifications - Apple Support

Learn about the types of memory (RAM) used in Mac Pro (2019).

support.apple.com

Install and replace memory in your Mac Pro (2019) - Apple Support

Learn how to remove and install memory in your Mac Pro.

support.apple.com

Original modules:

8 GB RDIMM: 1Rx8

SK hynix HMA81GR7CJR8N-WM

16 GB RDIMM: 1Rx4

Micron MTA18ASF2G72PZ-2G9E6TK

32 GB RDIMM:

64 GB LRDIMM: 4DRx4

SK hynix HMAA8GL7CPR4N-WM

128 GB LRDIMM



Mac Pro 6,1 (Late 2013)

Specification:
1866 MHz DDR3 ECC SDRAM memory (240-pin). May be Unbuffered (UDIMM) or Registered (RDIMM), but cannot be mixed.

Number of memory slots:
4

Maximum RAM:
128 GB

Mac Pro (Late 2013) memory specifications:

Mac Pro (Late 2013) - Technical Specifications - Apple Support

support.apple.com

Original modules:

4GB DIMM

8GB DIMM

16 GB DIMM



Mac Pro 4,1 & 5,1 (Early 2009, Mid 2010, & Mid 2012)

Specification:
1066 MHz or 1333 MHz DDR3 ECC SDRAM memory (240-pin). May be Unbuffered (UDIMM) or Registered (RDIMM), but cannot be mixed.

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
4 (single processor) or 8 (dual processor)

Maximum RAM:
96 GB (single processor) or 256 GB (dual processor)

Original modules:

1 GB DIMM

2 GB DIMM

4 GB DIMM

8 GB DIMM (5,1)



Mac Pro 3,1 (Early 2008)

Specification:
800 MHz DDR2 ECC "fully-buffered" FB-DIMM memory (240-pin)

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
8

Maximum RAM:
64 GB

Original modules:

1 GB FB-DIMM

2 GB FB-DIMM

4 GB FB-DIMM



Mac Pro 1,1 & 2,1 (2006 & 2007)

Specification:
667 MHz DDR2 ECC "fully-buffered" FB-DIMM memory (240-pin)

Memory specifications:

Mac Pro (Mid 2012 and earlier): How to remove or install memory

Learn how to remove memory from or install memory into your Mac Pro computer (Mid 2012 and Earlier). Note: There are different instructions for the Mac Pro (Late 2013).

support.apple.com

Number of memory slots:
8

Maximum RAM:
32 GB

Original modules:

512 MB FB-DIMM

1 GB FB-DIMM

2 GB FB-DIMM

I bought 8 pcs of 16GB 10600 memory on Ali Express.
My computer: 5.1 (2010) 2x3.46 GHz NVME SAMSUNG EVO 960 Rx 580
Previously, I had a 32 GB 12800 memory and showed a maximum of 1333, but now the new one with Ali Express is 10600 and shows a maximum of 1066. Why is this a problem?
The memory had to be returned

 

[tsialex]

I bought 8 pcs of 16GB 10600 memory on Ali Express.
My computer: 5.1 (2010) 2x3.46 GHz NVME SAMSUNG EVO 960 Rx 580
Previously, I had a 32 GB 12800 memory and showed a maximum of 1333, but now the new one with Ali Express is 10600 and shows a maximum of 1066. Why is this a problem?
The memory had to be returned

You bought 4Rx4 DIMMs instead of the required 2Rx4. Quad Rank DIMMs suffer penalties when installed on Westmere Xeons.

 

[poundman]

Given the advise in this thread, is there a memory brand that you have found to work better in 5,1? Samsung, Hynix, etc?