#Mac pro 5.1 max memory how to
#Mac pro 5.1 max memory for mac
#Mac pro 5.1 max memory full

64GB of RAM for a single core or 128GB of RAM for a Dual Core is the maximum you can physically fit into a Mac Pro 5,1.īut then, in reality, a single core really only makes use of 48GB and the dual-core 96GB, so any more than this and that additional RAM is wasted. Should you go for higher RAM Clock speeds or capacity So quite a big difference in speed, almost a 12% reduction in single core performance and a massive 31% performance drop on the multi-core.įrom this, we can take it that cutting the MHz speed of the memory will make a huge difference to the performance of your machine. Now swapping those out for the same sized 16GB modules but as 1066MHz and we get the following results. Only one way to find out and that’s to test the same machine in GeekBench 4 with the different types of RAM.įirst up is 32GB of the 1333MHZ in two 16GB Modules. There’s obviously going to be a difference in the performance, but how much of a difference and is it worth skimping on the cost? What effect do RAM clock speeds have on the Mac Pro performance However, these can cost a fortune and a quick search will show that you can get old server RAM PC3-10600 DDR3 ECC rated at 1066MHz is a far cheaper option at half the price. Essentially if you want the maximum performance for your computer you’ll need sticks (DIMMs) with that clock speed. The Mac Pro 5,1 have a minimum clock speed of 1333MHz. The next stage is really important as it can hugely affect the speed of your machine and also impact your wallet.Īs you look for RAM you’ll notice that there are a series of different clock speeds. I’ll assume you’ve boosted your Mac with the upgraded 3.46 GHz 6-Core Intel Xeon (X5690) already. Search for this type of RAM and you’ll get an assortment of sizes. The type of RAM that fits the Mac Pro 5,1 or upgraded 4,1 is: PC3-10600 DDR3 ECC

#Mac pro 5.1 max memory how to

I won’t go into breaking down all the different numbers and letters that RAM modules seem to have, but I’ll give you the tools know how to go out and buy RAM and be happy that it will provide you with the best possible performance.Īs a few have discovered less can be more, especially in the case of the dual-core machines. But more than that why it’s important to not only look at the RAM size 1, 2, 4, 8, 16GB etc but also the clock speed. I am running latest 10.14, the latest officially supported MacOS for MacPro 5,1.In this feature, I’ll be talking about the RAM and what fits in your machine. What is the limiting criterion? Is there a list of fully supported memory? Does it make sense to force my Mac to run the memory at 1333 MHz and if yes: is there a way to do so?

#Mac pro 5.1 max memory full

On what does it depend whether 1333 MHz memory runs at full speed on my Mac Pro? But still 1066 MHz.Īll this does not really makes a consistent picture to me. Populating Slots 1-3 and 5-7 with SK Hynix HMT351R7EFR4A-H9 Memory, wich should be single-ranked.That also resulted in 1066 MHz memory speed Populating slots 1-3 and 5-7 (Numbering according to Apple docs) with the RAM modules.

#Mac pro 5.1 max memory for mac

On the other hand there is also quad-rank memory sold on ebay specifically for mac pro 4,1/5,1. According to Mac Rumors Forum quad-rank could be a problem.

Instead it is recognised as 800 MHz Memory when all 8 Memory Modules are plugged in. I expected my Mac to recognise it as 1333 MHz memory. I ordered 8x16GB SK Hynix RAM HMT42GR7CMR4C-H9 on eBay.

This Mac is originally a Mac Pro 4,1 with flashed firmware to Model 5,1.

I have a question concerning the memory spec for my Mac Pro.