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Trebuin

macrumors 65816
Original poster
Jun 3, 2008
1,494
272
Central Cali
Contribution links:
First 8 core hand's on
10 core hand's on
iMac Pro Ram Pricing & Availability
VESA Mount

Things to expect:
Noise tests
Video Tests
(I will need help from someone who has an 8 core with Vega 56 and someone with a 10 core with Vega 64)

iMac Pro Ram Upgrades:
So people have read that the iMac Pro can have the ram upgraded, just not by us. I actually talked with Apple about six month ago about this very subject & here's what I learned:

1) Teardown enthusiasts can upgrade their own ram at the cost of risking warranty violation
2) Apple will upgrade the ram at Apple RAM cost (you buy their RAM still)
3) A third party authorized apple service center will upgrade your ram by your choice of either Apple provided RAM or:

You can BRING YOUR OWN RAM & have the authorized third party service center install it. Your warranty will be retained. The RAM will only carry the RAM's manufacturer's warrant & you will have to have RAM related issues serviced by a third party after the install. Apple will replace it with the original quantity installed upon purchase unless you upgrade through apple. So if I upgrade 32GB RAM to 128 on my own & it flakes out, If I take it to Apple, they will replace it with 32GB Apple RAM. The authorized third party will pull the RAM & ask you what to do...that's where you can have it sent in to be replaced on your own & bring the replacement to be installed.

For where I live, "Core Care of Rocklin" provides this service. Apple sent me there when I needed my macbook's battery replaced but I still needed to keep access to the laptop. Core Care did their test, ordered the battery, & called me back to supply the MacBook when they were ready to install it. 1 hr turnaround. That's what third parties can do for you. The cost of replacing RAM will be probably $70-150 plus the cost of the RAM.

So how do you find an authorized third party service center? Just ask Apple support & they will provide you the list of nearest authorized service centers. To know they are good, they will always run a diagnostics report & submit it to Apple & give you a copy. This is what Apple does as well when they do their work.

So what are the risks?
1) it costs a service center service payment
2) They crack the screen open so you risk dust between the glass & the LCD
3) The entire Motherboard needs to be pulled out so you risk damage. Humans are imperfect. I once had a Dell Laptop returned from the service center with the trackpad broken. I couldn't fix the motherboard, but I could tear it apart myself to find that they forgot to plug the trackpad back in...one of over a dozen connections.
4) Compatibility issues: not all RAM is equal & you could have issues. Have them do a full memory test before giving it back. 2017 iMac owners learned this when using Kingston's low CL ram...they learned that if you mix it, the RAM down clocks.


I hope this helps & have a great day!

CPU Geekbench Benchmarks:
Initial benchmarks from Geekbench:
8 core: 4937 single thread / 30088 multi thread
10 core 2: 4971 single thread / 34006 multi thread
10 core: 5345 single thread / 35917 multi thread
i7 (2017 imac) 5715 single thread / 19675 multi thread

10 core is 8.2% faster on single threaded operations and 19.4% faster on multi threaded operations

Keep in mind that this is a synthetic total number and if you look at the single core ops, each will be better at certain things.

10 core: https://browser.geekbench.com/v4/cpu/4449687
10 core 2: http://browser.geekbench.com/v4/cpu/5469097
8 core: https://browser.geekbench.com/v4/cpu/5471001
i7: https://browser.geekbench.com/v4/cpu/5543682

Source:
http://browser.geekbench.com/v4/cpu/search?utf8=✓&q=Mac-7BA5B2D9E42DDD94

Update: I added a second core 2 that popped up. Basically, it shows the first benchmark where the single thread operations almost matches the 8 core...which is more along the line of how I was expecting the two cores to perform. Basically, I'm waiting for a series of longer benchmarks to get the cpus to perform more continuously for rigor.

Basically, the CPU needs to be measured where it is actually stressed. A split second, momentary test will capture the max clock (4.5 vs 3.0 for the 10 core). This will artificially show the 10 core performing single thread ops as higher. Also, the cache has an affect which helps to boost performance on the 10 core. I expected some performance boost due to that, but not a 9% gain. I can say more certainly when more time consuming benchmarks come out.

As many of you are seeing, the 8 & 10 cores are as follows:

8 core: 3.2 GHz Base, max up to 4.3
10 core: 3.0 GHz Base, max up to 4.5

It's a $800 upgrade ($720 if discounted through EPP or Edu)

The performance should be about the same on the single core tasks & the 10 core will beat the 8 by 17% on multi core tasks. For me, this equates to 10 min savings on a normally 1hr project. I personally couldn't justify this upgrade. I'll post the 8 core benchmark when mine finally comes in.

Thermal Tests:

Thermals of the 10 core:
yes-x20-crop-jpg.744081

(c/o: nick82)

Thermals of the 8 core:
screenshot-2017-12-23-22-13-42-png.743495

(c/o: bplein)

Takeaway:
The 8 core runs at about 3.9 GHz constantly; 93 degrees
The 10 core runs at about 3.5 GHz average; 95 degrees, but thermally clocking down

Geekbench shows single thread as a higher performer (which affects gaming) in the 10 core because the thermals off of the left image shows that it does not heat up quickly...& geek bench does not last long enough to clock down.

Drive Wiping & Reinstalling OsX High Sierra without DFU:
Be careful here. I used bootcamp & had an issue that required me to install 8 (which is not supported by the iMac Pro). I had to wipe the bootcamp partition because it was corrupted after wiping. Bootcamp assistant did not give me the option to remove the bootcamp partition on its own. Bootcamp would not allow me to reinstall after that either. If you want to do the upgrade method, provided you have upgraded once in the past, follow the link to bootcamp details:
https://forums.macrumors.com/threads/imac-pro-bootcamp-windows-10-limit-fix.2097652/

I finally booted into regular recovery, disabled boot security, & wiped the OSX partition as well...only the osx partition as there appeared to be more. I then created a new APFS partition & immediately went to install OSX. Everything went successful. I did not need a DFU boot.

Geekbench testing thermals & CPU use (8 Core):
1-5-jpg.744130

3-jpg.744131


Apple Solid State Drives
The commercial market attempts to sell "fast" drives that hold a very high read & write for sequential disk operations. The Apple drives do a good job doing this. You can see this reflected in Blackmagic Disk Speed tests. The problem is, most of our operations fall within the 4K realm or close (ref: thessdreview.com). Per Les Tokar, the 4k or 4kQD32 results are what we should be looking at. Apple also does a pretty good job here as well. We used AmorphousDiskMark which is a authorized OsX conversion of Crystal Disk Mark, but does not use the same read/write methods so they will differ from windows. You can only compare Amorphous tests to other Amorphous tests.

1TB:
From the teardown, we know that the 1TB drives consists of two 512GB modules connected in RAID.
apple-ssd-ap1024m-png.743489

(c/o: bplein)

2TB:
Likely, the 2TB drives are also two 1TB modules are likely connected in RAID as well, but no teardown has been performed with this configuration.
untitled-5-jpg.744134


GPU Tests:
Thanks to bplein, we got an early look at the graphics tests. He used a Vega 64 card & posted Cinebench R15 results. These are good to reference against a GPU master list of benchmarks located at https://www.notebookcheck.net/Mobile-Graphics-Cards-Benchmark-List.844.0.html . To update the default list, change it to show all GPUs (desktop & mobile) & add Cenebench R15.

screenshot-2017-12-23-21-42-56-png.743486

(c/o: bplein)

With 1255.99 fps, this holds its own against nVidia. The notebook check results are currently limited with the high end cards, so the 1080 TI SLI desktop appears lower at 119fps, but there are benchmarks of the 1080 being in the 160 range. You'd have to dig into the card details to see those results. The performance should be along the line of the nVidia 1070 desktop GPU.

Awaiting Vega 56 results.
 

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I was doing similar math.
3.2*8=25.6
3.0*10=30

Boosted:
4.3*8=34.4
4.5*10=45

So you'll see a solid increase in Turbo boost on applications that take advantage of multiple cores.

I assume that both of these chips support hyper threading, no? So it's 8/10 physical cores with 16/20 total cores logically speaking.

$800 extra is an entirely personal decision but for my workflow, I still work with a lot of software that doesn't take advantage of multiple cores so that higher base frequency would still impact my day to day whereas the weekly 4K editing would be nice to have 10 cores transcoding simultaneously.
 
I bought the 8-core. I am not using this workstation for work, it's for personal use. I edit and render 4k video occasionally but not all the time. I work with Lightroom and big RAW files, but not every day.

I really wanted to go to the 10-core system but couldn't justify it. I'm already going to get an earful from my wife for ordering this (she knew this was coming but i don't think she knew it would be over 5 grand)
 
I bought the 8-core. I am not using this workstation for work, it's for personal use. I edit and render 4k video occasionally but not all the time. I work with Lightroom and big RAW files, but not every day.

I really wanted to go to the 10-core system but couldn't justify it. I'm already going to get an earful from my wife for ordering this (she knew this was coming but i don't think she knew it would be over 5 grand)
I plan on doing the same when I order mine. Did you upgrade the GPU or Ram at all?

Those are the two upgrades I'm thinking about, but I'm wondering if its actually worth it for me. I want to upgrade the ram to 64GB and the GPU to the 16GB model.
 
I plan on doing the same when I order mine. Did you upgrade the GPU or Ram at all?

Those are the two upgrades I'm thinking about, but I'm wondering if its actually worth it for me. I want to upgrade the ram to 64GB and the GPU to the 16GB model.

Yes, I went with 8 core but did upgrade the memory & video card to future proof the thing. I’m disappoint the ram cost so much but I decided not to mess with the warranty. Running 3 operating systems at the same time will put a demand on it.
[doublepost=1513263350][/doublepost]
I was doing similar math.
3.2*8=25.6
3.0*10=30

Boosted:
4.3*8=34.4
4.5*10=45

So you'll see a solid increase in Turbo boost on applications that take advantage of multiple cores.

I assume that both of these chips support hyper threading, no? So it's 8/10 physical cores with 16/20 total cores logically speaking.

$800 extra is an entirely personal decision but for my workflow, I still work with a lot of software that doesn't take advantage of multiple cores so that higher base frequency would still impact my day to day whereas the weekly 4K editing would be nice to have 10 cores transcoding simultaneously.

Keep in mind that the COU usually won’t hang out at 4.3 or 4.5 if doing any loaded work. That’s really only for accelerating opening applications.
 
I plan on doing the same when I order mine. Did you upgrade the GPU or Ram at all?

Those are the two upgrades I'm thinking about, but I'm wondering if its actually worth it for me. I want to upgrade the ram to 64GB and the GPU to the 16GB model.

I got the first standard config up from the base, 8-core, 64GB RAM, Vega 64, 1TB.

My thinking was this: I plan on using this for 5 years (my late 2012 iMac is approaching 5 years on my desk). So I want to avoid cracking it open to upgrade RAM and video cards are advancing so rapidly that i wanted to max that out as well. I'm a bit disappointed that I didn't get the 2TB SSD but my plan is to run an external 2TB SSD as "tier 2" storage. I may also just put tier-2 on SSD in my server in my office closet, which has lots of PCIe SSD and 10Gbit as well. I think I need to rework my workflow, I have tons of media locally that I rarely access.
[doublepost=1513263991][/doublepost]
I’m disappoint the ram cost so much but I decided not to mess with the warranty.

Don't feel that bad about the memory costs: I did a quick search on Crucial.com and upgrading from 32GB ECC to 64GB ECC is about $500. So the uplift is $300... sure, quite a bit, but not as bad as we've seen from Apple on more mundane non-ECC RAM in their other systems.

I believe this uplift can be a lot worse for people in some countries due to Apple's pricing differences. I feel for those folks.
 
As many of you are seeing, the 8 & 10 cores are as follows:

8 core: 3.2 GHz Base, max up to 4.3
10 core: 3.0 GHz Base, max up to 4.5
Where are you seeing 4.3 turboboost on the 8-core? Apple has it at 4.2. The 14 and 18-core chips are 4.3. Not a big difference, but..

We only have benchmarks for the 10-core, but are there any benchmarks of PCs that would show the difference between the 8-core and 10-core chips. I'm very curious about what the performance difference between the 8-core iMac Pro and the i7 iMac will be.
 
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Where are you seeing 4.3 turboboost on the 8-core? Apple has it at 4.2. The 14 and 18-core chips are 4.3. Not a big difference, but..

We only have benchmarks for the 10-core, but are there any benchmarks of PCs that would show the difference between the 8-core and 10-core chips. I'm very curious about what the performance difference between the 8-core iMac Pro and the i7 iMac will be.

Typo, yes, 4.2. I had to dig up similar processors of the same speed & gen to get a close enough benchmark, & that was not easy. It should be close to the same.
 
I'm curious about the current limitation of the base video card compared to the greatest. I for now don't have a usage for it right now, but curious of what usage it could give. Especially I'm wondering if there is any really bump in perks for some machine learning work
 
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Congrats Trebuin & bplein on your orders!

This is tough...I'm not getting much editing work done today as I follow all of the conversations. I should probably ignore them until these bad boys are out in the wild and we have some real-world reports, but I can't help myself...for at least the next 24 hours or so. :D
 
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Congrats Trebuin & bplein on your orders!

This is tough...I'm not getting much editing work done today as I follow all of the conversations. I should probably ignore them until these bad boys are out in the wild and we have some real-world reports, but I can't help myself...for at least the next 24 hours or so. :D
Try working on a core 2 on a 2007...night & day
 
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I was doing similar math.
3.2*8=25.6
3.0*10=30

Boosted:
4.3*8=34.4
4.5*10=45

So you'll see a solid increase in Turbo boost on applications that take advantage of multiple cores.

I assume that both of these chips support hyper threading, no? So it's 8/10 physical cores with 16/20 total cores logically speaking.

$800 extra is an entirely personal decision but for my workflow, I still work with a lot of software that doesn't take advantage of multiple cores so that higher base frequency would still impact my day to day whereas the weekly 4K editing would be nice to have 10 cores transcoding simultaneously.
TurboBoost 2.0 doesn't work that way. (and yes, it's 2.0, not 3.0)

Subject to thermal limits, one core can temporarily be overclocked to 4.5 Ghz. Or two cores to somewhat less. Possibly four to even less. But there's no way that you're going to get all ten cores up to 4.5 Ghz without melting something (or runnng into the hardcoded limitations of the TB 2.0 feature)
 
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I bought the 8-core. I am not using this workstation for work, it's for personal use. I edit and render 4k video occasionally but not all the time. I work with Lightroom and big RAW files, but not every day.

I really wanted to go to the 10-core system but couldn't justify it. I'm already going to get an earful from my wife for ordering this (she knew this was coming but i don't think she knew it would be over 5 grand)


Curious why did you go with iMac Pro over a iMac considering your usage. If you shop smart a 1 TB SSD I7 with 8GB GPU and aftermarket RAM can be done almost half the price.
 
Curious why did you go with iMac Pro over a iMac considering your usage. If you shop smart a 1 TB SSD I7 with 8GB GPU and aftermarket RAM can be done almost half the price.

I know you didn’t ask me, but I’m running three operating systems at the same time, using over 1TB on a SSD & storage drive, eating up every inch of 6GB. My MBP is using all 16 GB of installed ram with two operating systems & not running any of my major software.
 
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Would be interested to speed test the different setups.
I went full crazy and ordered the 10 core with 64gigs of RAM and the 16GB Vega 64.

I’ll be receiving mine beginning of January so we could try out running different benchmarks.
I have the feeling the 8 core version will be the best value for money.
 
Would be interested to speed test the different setups.
I went full crazy and ordered the 10 core with 64gigs of RAM and the 16GB Vega 64.

I’ll be receiving mine beginning of January so we could try out running different benchmarks.
I have the feeling the 8 core version will be the best value for money.

I’ll have the 8 core Vega 64 a bit sooner & will do some benches on it
 
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More benchmarks released...first showing the 10 actually close to matching the 8 core performance, which was what I was originally expecting.
 
Have any links?...

The following was posted Dec 20 on Jonathan Morrison's TLD vlog. These guys did a bunch of tests comparing a 10-core Vega64 iMac Pro vs a top-spec 2017 iMac 27 vs a top-spec 2017 MBP:

These tests included both CPU-intensive image processing and FCPX rendering. In some real-world cases they found the iMac Pro was vastly faster than the Geekbench numbers indicate.

It's a long streamcast with a lot of jokey posturing, but interspersed there are some valuable tidbits. Below are some key statements at certain time offsets:

00:34:00 : Under heavy multi-core stress, the iMac Pro was quieter than the iMac

00:37:30 On a Cinebench-like multithreaded CPU test, execution time was iMac Pro: 05:02, iMac: 12:07, MBP: 22:11

00:35:00: iMac Pro FCPX timeline scrubs smoothly using unrendered RED 8K raw, 12:1 compression, plus effects

00:48:10: From FCPX, on all three machines begin timed export of 3 min 8k RED raw 12:1 in a 4k unrendered timeline to 4k H264

00:50:05: Laughing at how much faster the iMac Pro is than the top-spec 2017 iMac

00:53:15: Export progress: iMac Pro at 60%, iMac at 6%, MBP at 3%

00:55:35: iMac Pro finishes the export in 05:45, while the iMac is at 11% and MBP at 5%

00:58:00: "If you're just doing 4k ProRes, you won't see advantages using the iMac Pro." They repeated these statements multiple times, which (1) Is not true in the real world when effects are involved, and (2) Does not consider the vast amount of acquisition done in H264. If they think a iMac Pro isn't useful on 4k, they should try putting Neat Video, stabilization, Imagenomic Portraiture and Digital Anarchy Flicker Free on some 4k clips and rendering that on an iMac.

1:02:00: Both iMac and MBP are significantly louder than the iMac Pro when all are under similar high stress

1:05:05: More laughter about how much faster the iMac Pro is than the top iMac and MBP.
 
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