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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

New MacPro predictions? Hopes? Fears?

DJ Meyer said:
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That’s a pretty big aside. Our iMac Pro has been similar to the TrashCan in that regard. Throttles and will eventually shut down if you slam it with work for more than 30 minutes or so.
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That hasn't been my experience at all. If you are having throttling and shut downs your machine has an issue. I regularly do Arnold renders for 12 hours at a time on my 18 core without any issues or throttling with a stable clock speed. No standard Xeon is going to sit at it's max possible clock speed when hitting all core all the time and they aren't designed to. I have done the same on more than a dozen of them without issue. I can say the same about the 2013 Mac Pro as well actually and I have used so many of them I have lost count.
 
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andrewhake said:
That hasn't been my experience at all. If you are having throttling and shut downs your machine has an issue. I regularly do Arnold renders for 12 hours at a time on my 18 core without any issues or throttling with a stable clock speed. No standard Xeon is going to sit at it's max possible clock speed when hitting all core all the time and they aren't designed to. I have done the same on more than a dozen of them without issue. I can say the same about the 2013 Mac Pro as well actually and I have used so many of them I have lost count.
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Both iMac Pros I use with regularity have been serviced under warranty for it and the failure rate in our trash can d700s is about 40%.

Here’s hoping they’ve learned their lesson. Never had such issues with the older Pros.
 
Made my own draft of that leaked concept.

macproconcept01b-jpg.836867
 
Jarek Zabczynski said:
Made my own draft of that leaked concept.

macproconcept01b-jpg.836867
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Nice AMD Threadripper Machine


Meanwhile with intel CPU's:

Testing conducted by Apple in May 2019 showed as much as a 40 percent reduction in performance with tests that include multithreaded workloads and public benchmarks. Performance tests are conducted using specific Mac computers. Actual results will vary based on model, configuration, usage, and other factors.

How to enable full mitigation for Microarchitectural Data Sampling (MDS) vulnerabilities
This option is available for macOS Mojave, High Sierra, and Sierra after installing security updates.

Intel has disclosed vulnerabilities called Microarchitectural Data Sampling (MDS) that apply to desktop and notebook computers with Intel CPUs, including all modern Mac computers.

Although there are no known exploits affecting customers at the time of this writing, customers who believe their computer is at heightened risk of attack can use the Terminal app to enable an additional CPU instruction and disable hyper-threading processing technology, which provides full protection from these security issues.

This option is available for macOS Mojave, High Sierra and Sierra and may have a significant impact on the performance of your computer.

Performance impact of disabling hyper-threading
The full mitigation, which includes disabling hyper-threading, prevents information leakage across threads and when transitioning between kernel and user space, which is associated with the MDS vulnerabilities for both local and remote (web) attacks.

How to enable full mitigation for MDS in macOS
To enable full mitigation of MDS after installing security updates, start your Mac in macOS Recovery and then enter commands in the Terminal app.

Turn on or restart your Mac and immediately press and hold Command (⌘)-R or one of the other macOS Recovery key combinations on your keyboard.
From the Utilities menu in the menu bar, choose Terminal.
Type the following two commands, one at a time, at the Terminal prompt. Press Return after each one.
nvram boot-args="cwae=2"
nvram SMTDisable=%01
From the Apple menu , choose Restart.
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Threadripper with Zen2 was silently removed from the AMD roadmap.
AMD and ARM cpu's are not affected by security issue
 
AMD has encountered some vulnerabilities relating to Spectre or Meltdown style bugs and associated attacks. Where I feel the real problem with Intel and these vulnerabilities lies is with how Intel is handling them, or should I say NOT handling them. Since identified, we have seen software and firmware patches and no physical alterations to CPU designs to mitigate the problem. AMD has also issued the requisite firmware and software patches, however they have shifted their CPU lineup and have made design changes to CPUs in order to address the situation. It also helps that their CPU memory gate architecture is less vulnerable to begin with.

https://www.amd.com/en/corporate/product-security
 
Jeff Kilgroe said:
AMD has encountered some vulnerabilities relating to Spectre or Meltdown style bugs and associated attacks. Where I feel the real problem with Intel and these vulnerabilities lies is with how Intel is handling them, or should I say NOT handling them. Since identified, we have seen software and firmware patches and no physical alterations to CPU designs to mitigate the problem. AMD has also issued the requisite firmware and software patches, however they have shifted their CPU lineup and have made design changes to CPUs in order to address the situation. It also helps that their CPU memory gate architecture is less vulnerable to begin with.

https://www.amd.com/en/corporate/product-security
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True, AMD solved them with Microcode and OS software updates and is not vulnerable to this leak.

The MDS attack can only be solved with microcode, OS software updates and tuning off HT(hyperthreading).

The leak was found on tuesday september 11, 2018.
The people who found the leak had to force intel to publish the leak in may 2019(otherwise they would bring it out in the open themselves), which is 8 months after discovery (normally it's upto 6 months), intel even offered to not pay $100,000 reward for finding the leak but to pay $40,000 for only the leak (so it wouldn't look as the highest risk leaks) + $80,000 outside the agreement. Intel also promissed the researchers that the next gen CPU's would get a hardware fix, we know now that it hasn't. Intel is kind of the Boeing of the computer industry, they care more about money than security.

nice explenation of this leak by RedHat
 
Misha Engel said:
As long as it's fast enough for it's task, who cares.
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Many people use more than one application.

For example, the vast majority of high end 3d renderers are CUDA only if you want to use GPU.

It doesn't matter how fast a given AMD card is in Resolve if you also want to use Arnold, V-Ray, Maxwell, Octane, Redshift. etc etc
 
When you want to use Mojave or higher it's AMD only.

When CUDA only software is important, don't get a Mac.
 
With legit eGPU support - including nVidia - the new MBP would be sweet. Sadly, even the top level internal GPU options max out at 4GB of VRAM. Max BTO system RAM is 32GB, so caching frames for smoother playback won't last long.

This is the laptop they should have released a year ago...

Cheers - #19
 
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