**EDITED as I referred to the wrong poster and added more technical info**
Hi mavericks7913,
The Xeon CPU that Apple tested has yet to be released and is a generation ahead of currently available CPUs. It's
boost clock is 4.4GHz, and as it is a newer generation - the Instructions Per Cycle/Clock (IPC) may be more efficient than those CPUs previously tested by Puget Systems. In other words, the New Xeon W
4.4GHz max boost could be more efficient "per clock"
* than current generation
4.3GHz boost clock (iMac Pro Xeon 14 Core model has
33.25MB cache [Puget System's test], the 18 core model has
42.75MB cache [Apple's Test] -
both iMac Pro models boost at 4.3GHz), and maybe even the i9 9900K (
5.0GHz boost) used in Puget System's Testing quoted in Post #1.
This may be verified by Puget System's testing in the future.
*Even if the IPC were the same between the current Xeons used in the tests and new model Xeons - there is still a 0.1GHz difference favouring the upcoming generation of Xeon CPUs in the New Mac Pro, as well as higher cache (66.5MB).
The to-be-released Mac Pro also has a 300W rated heatsink -
"probably" more superior
than offered by the iMac Pro models - this would
remove throttling at boosted frequencies from the CPU which could occur in the iMac Pro - which may also favour the New Mac Pro.
This may also be confirmed by using a
sustained CPU heavy benchmark on a few Mac and PC models.
Considering that both the iMac and to-be released Mac Pro models tested has a minimum of 256GB RAM, so it could be assumed that very large files were used (a heavy work load), and that the extra RAM may have tipped things in favour of the new Mac Pro.
Apple compared the to-be-released Mac Pro with previous/current generation models on their CPU model (
Post #1)
Most customers tend to identify their model by their CPU specs.
For example - People are more likely to say that they have "the 12 Core Trash Can" model rather than saying "I have the (dual) D700 trash can model
^" -
even if they have both the 12 CPU Cores and dual D700 GPUs in their trash can Mac Pro.
^Other trash can models with fewer CPU cores could be configured with the dual D700 graphics.
How customers identify their computer model is usually a question of context.
As a result, Apple quoted the CPU spec of each of the model tested in the graphic you provided in Post #1 instead of the GPU specs in the models used in their tests.
In theory, Apple could have stated in the graphic (attached in Post #1) that they used the following 3 models:
New Mac Pro - Dual AMD Radeon Pro Vega II graphics with Infinity Fabric Link and 32GB of HBM2 each (
128GB total)
.
iMac Pro - Radeon Pro Vega 64X graphics with
16GB of HBM2.
Current Mac Pro - Dual AMD D700 Graphics with 6GB of vRAM/GDDR5 RAM each (
12GB total).
However, as mentioned previously, most of Apple's customers would more readily identify with the CPU model used in each test than the GPU used.
It is probably correct that Photoshop would not used more than 8 cores, but the new Mac Pro had a
much beefier GPU set up and more RAM (384GB compared to Puget System's 128GB RAM).
In
William Payne's testing, the Vega Pro GPU in your MBP had a higher % utilisation (90%) compared to your CPU utilisation (20-50% - although clocked at 4.0GHz).
As has been previously stated in above posts - the actual testing format used by Apple has not been released, although anyone can download the Puget System's test - so it is hard to create an apples-to-apple's comparison
as
's testing may have been more GPU focused (taking advantage of the dual Vega Pros and 128GB HBM2 -
8x more HBM2 than in the iMac Pro tested [16GB HBM2]).
It would be better to wait until the new Mac Pro is released and then run Puget System's benchmark first; and then maybe use a sustained heavier CPU based test to see if the differences in heatsinks between the iMac Pros and new Mac Pro (as well as a few PCs) have an influence in sustained boost CPU clocks.
Dominic
===================================================================
My background - I am a Pharmaceutical Scientist as well as being a computer hobbyiest (in my early 30s) - SoyCapitanSoyCapitan may have more IT experience than I have been alive LOL
.