MP 7,1 RAM upgrade question

[LEOMODE]

If I buy 32GB of RAM version (4x8GB) on Mac Pro 7,1, can I buy an additional 2x8GB compliant RAM and just put them into extra 2 slots and won't have any issue? I remember I was told I always had to use the same company (or at least preferred) for all RAMs. Any slowdown, or hiccups would be detrimental and time-wasting.

Thanks in advance.

 

[flowrider]

Many threads concerning RAM for the NcMP on this site. But to answer your question, as long as the modules you buy have the same specifications as the installed Apple RAM and are installed into the proper slots, the answer is YES ?

Lou

 

[LEOMODE]

Many threads concerning RAM for the NcMP on this site. But to answer your question, as long as the modules you buy have the same specifications as the installed Apple RAM and are installed into the proper slots, the answer is YES ?

Lou

Thank you, that's assuring.

 

[choreo]

I have been researching upgrading to 96-GB Ram (still waiting on my 7,1 to come in), but so far the only option I have found that is actually selling any is OWC?

 

[OkiRun]

I have been researching upgrading to 96-GB Ram (still waiting on my 7,1 to come in), but so far the only option I have found that is actually selling any is OWC?

Amazon sells some ~

 

[flowrider]

^^^^To get to 96GB you would need either twelve 8GB modules or six 16GB modules. I'm running twelve 8GB sticks.

I have been researching upgrading to 96-GB Ram (still waiting on my 7,1 to come in), but so far the only option I have found that is actually selling any is OWC?

DMS sells 16GB modules:

Mac Pro Memory - 2019 12-Core Xeon W 3.3GHz 7,1

DMS offers DDR4-2933 (PC4-23400) Memory for your 12-Core 3.3GHz 2019 Mac Pro 7,1. 100% Apple Compatible and backed by a Lifetime Warranty.

www.datamemorysystems.com

Lou

 

[codehead1]

I bought 6 x 16GB (DDR-3-2933 PC4-23400 RDIMM) Nemix for my 16-core, $489.99 plus tax, free shipping took two days from Florida to California despite a longer estimate at checkout. (Someone on the board was looking for 4 x 8GB, I gave him a good price and he saved me from dealing with eBay or other—we were both happy).

The most important thing is to fill six channels (either 6 or 12 DIMMs, basically the same thing). Although I've seen a lot of people add 2 x 32GB to the base (the cheapest route to 96GB), I believe that's a particularly bad way to go, leaving a big chunk of memory two channels wide. The math is pretty straight on that issue—4x is twice as efficient as 2x, and 6x is three times. Looking at it the other way, 4x is two-thirds efficient (not ideal, but not horrible), but 2x is only one-third (ugh).

At Nemix prices, if you sell the original 4 x 8GB to someone wanting to flesh out via that route, the difference in cost for 6 x 16GB versus adding 2 x 32GB to get to 96GB is minimal, and it's a lot better on memory throughput. (Cost difference is $211 plus your local tax on that amount, minus what you can get for the 4x8GB.)

 

[choreo]

I bought 6 x 16GB (DDR-3-2933 PC4-23400 RDIMM) Nemix for my 16-core, $489.99 plus tax, free shipping took two days from Florida to California despite a longer estimate at checkout.

That is what I was looking at with OWC 6x16GB upgrade.

 

[DFP1989]

That is what I was looking at with OWC 6x16GB upgrade.

I bought the OWC 96GB kit for mine, my system just arrived so will be installing it tonight.
My plan is to sell off the 8GB sticks eventually.

 

[bob_stan]

I bought it also months ago and it has worked flawlessly.

 

[tanoanian]

I've got 192GB of Nemix RAM in mine and it has worked flawlessly. Much cheaper than OWC and they offer a discount for Veterans.

 

[choreo]

I bought 6 x 16GB (DDR-3-2933 PC4-23400 RDIMM) Nemix for my 16-core.

When I go to the Nemix website it says they offer for the 12-core 2019 Mac Pro "Type: LR-DIMM or R-DIMM"; however, when I go to their 96-GB page https://www.nemixram.com/96gb-6x16g...ple-mac-pro-2019-macpro-7-1-by-nemix-ram.html how can I tell if it is "Type: LR-DIMM or R-DIMM"?

Also, what does Apple ship with - LR or R?

If I install 6x16-GB modules, why not just add 2 more 8-GB modules on top of the 4x8-GB modules mine came with - taking the total to: 144GB? Is there downside to that?

 

[LEOMODE]

When I go to the Nemix website it says they offer for the 12-core 2019 Mac Pro "Type: LR-DIMM or R-DIMM"; however, when I go to their 96-GB page https://www.nemixram.com/96gb-6x16g...ple-mac-pro-2019-macpro-7-1-by-nemix-ram.html how can I tell if it is "Type: LR-DIMM or R-DIMM"?

Also, what does Apple ship with - LR or R?

If I install 6x16-GB modules, why not just add 2 more 8-GB modules on top of the 4x8-GB modules mine came with - taking the total to: 144GB? Is there downside to that?

So 9to5 Mac guy ordered a 32GB setup for his Mac Pro (4x8GB), and just bought 2x16GB and just made it 64GB of RAM. Since they don't have 8GB each, wouldn't that deter performance? He even showed Apple's recommendation of saying each slot should have the same memory for most optimization.

If I were to buy like him, would I lose performance basically?

 

[LeonPro]

Apple ships both the LR and R depending on the amount of RAM you ordered upon ordering.

"Configured from Apple, Mac Pro models include the following DIMM types:

• R-DIMMs for configurations up to 192GB (6x32GB).
• LR-DIMMs for configurations of 384GB (6x64GB) or more. "

Like what has been mentioned above, it's best to configure in 6 or 12 dimm slots. As far as mixing different sizes, based on what I've read it's not "bad" per se. It's just not being as efficient as having the same kind memory all through out the channel.

First, make sure each channel are run in pairs for optimum performance of that specific channel.

Second, follow Apple's recommendation where to slot the higher sized RAM.

"If you use 32GB DIMMs with other capacities, such as 8GB or 16GB, they must be installed according to these requirements:

• Use only R-DIMMs.
• Use a supported configuration.
• Install the 32GB DIMMs in the first slot of each channel pair."

 

[LEOMODE]

"If you use 32GB DIMMs with other capacities, such as 8GB or 16GB, they must be installed according to these requirements:

• Use only R-DIMMs.
• Use a supported configuration.
• Install the 32GB DIMMs in the first slot of each channel pair."

Yup, looks like that's what 9to5 mac did.

 

[flowrider]

Also, what does Apple ship with - LR or R?

If I install 6x16-GB modules, why not just add 2 more 8-GB modules on top of the 4x8-GB modules mine came with - taking the total to: 144GB? Is there downside to that?

First Question - Look in "About This Mac" - "Memory":

Second Question:

To get the most out of your new Mac run only six or twelve Dimms. If six, all should be matching. If twelve all twelve should be matching or six should be matching and the other six should match each other. Any other congifuration will suffer a speed penalty.

Lou

 

[choreo]

Second Question:

To get the most out of your new Mac run only six or twelve Dimms. If six, all should be matching. If twelve all twelve should be matching or six should be matching and the other six should match each other. Any other congifuration will suffer a speed penalty.

Lou

Sounds like my safest bet may be to just install 6 new matched 16-GB modules and sell the 4 8-GB modules that came with the machine.

 

[flowrider]

^^^^That'll work. As an aside, you'll notice I am running all 8GB modules. I bought the other eight from folks on this forum.

Lou

 

[codehead1]

Sounds like my safest bet may be to just install 6 new matched 16-GB modules and sell the 4 8-GB modules that came with the machine.

It's the best way to go as long as 96 GB is good enough, as it should be at this time for most people. You asked about adding 6 x 8 GB in the other slots, and that should be fine too, but for the time being you'll just be spending more money on memory you don't need right now, and in the future if you find you need more, you'll probably want another 96 GB as opposed to 48 GB—by then the 16's should be cheaper.

I think I covered this somewhere, maybe another thread, but LR-DIMMs are for high capacity, R-DIMMs are faster (lower latency).

 

[choreo]

So, do I have a problem?

I just received and installed 96-GB of Nemix RAM:
96GB 6x16GB DDR4-2933 PC4-23400 RDIMM Memory for Apple Mac Pro 2019 MacPro7,1
SKU: MR23400-614K06-AMP2019

Here is what the system sees?

Did they send me 2400 vs 2933 which I ordered?

 

[LeonPro]

Clearly 2400Mhz performance is what's being recognized by Apple for that RAM. What does the actual spec on the RAM sticks state?

 

[choreo]

Just pulled one out and it shows 2933?

[automerge]1595643613[/automerge]

[automerge]1595643658[/automerge]
Must be mis-labeled? This is what Techtool Pro 12 sees...

 

[LeonPro]

It definitely is mislabeled to me. Looking at the RAM number itself against the SKhynix website shows the particular model is capable of 2400 MHz speed as you already saw which has the UH part number. Not even the VK part number was given to you for an 8-core Mac Pro.

H5AN8G8NMFR < PRODUCTS < SK Hynix

www.skhynix.com

 

[choreo]

The fun never ends!

 

[OkiRun]

Does your online order

The fun never ends!

Does your online order list 2933?

Mine did ~

and the Mac Pro identifies it ~