This might seem like a staggering amount of memory, and while it is certainly a lot of RAM, there are many tasks and workflows where having the full 128GB is absolutely necessary.
You may have noticed in our 32GB modules, the 1066MHz memory clock limit in the Apple 2013 Mac Pro. Current DRAM drive technology limits the 32GB modules to the 1066MHz speed, but due to enhanced CAS Performance of OWC MaxRAM 32GB Modules, actual real-world performance between 1866MHz and 1066MHz is insignificant in low memory need scenarios while offering incredibly significant performance gains in all cases where application use benefits from greater than 64GB of total memory installed.
And as you can see in the chart below from Mac Performance Guide, workflows can be substantially accelerated with more memory installed, in this case with the maximum of 128GB:
Mac Performance Guide shows that a Mac Pro with 128GB of memory is an incredible 21X faster than with 64GB installed in this Photoshop performance test, proving just how much having more memory can accelerate your workflow and allow you to run more apps to maximize your processor’s cores.
However, you don’t have to have a 2013 model to get awesome performance from a Mac Pro. If you’re looking to boost your previous generation Mac Pro, you can add up to 128GB in some models. You can also get a huge speed and graphics performance boost with a Mercury Accelsior_E2 and a Sapphire HD 7950 graphics card!