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iMac 2020 Reviews And Benchmarks - The Last Intel iMac

ninja2000 said:
Ha came here to post a link to my video and you have done it :) thank you.

If there is anything anyone else would like me to do let me know
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Great video! Sorry to steal your thunder! Question though, do your OpenCL results show 32 compute units instead of the expected 36. If so, do you know why this is? I noticed this when browsing through scores, that the OpenCL results for the 5300 show 20 CUs, the 5500 XT show 24 CUs, the 5700 XT show 40 CUs (all as expected), but the 5700 show 32 CUs. I don't know very much about these sorts of things, but it's struck me as odd that the benchmarks for the 5700 generally have it in the middle between the 5500 XT and the 5700 XT, or even closer to the 5500 XT. There should be 12 more compute units available in the 5700 and only an additional 4 in the 5700 XT. So I wonder if Geekbench isn't somehow recognizing all 36 CUs. See a little more information near the bottom of this thread:

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Geekbench 5 iMac Metal Rough Comparisons - which card to get?

We've discussed this a bit in other threads and here's the first comparison I've been able to do for those wondering what to do owning a 580x iMac. 5700 16gb is 57898, 59417, 56291 5700 8gb scores 53232, 49344 (https://browser.geekbench.com/v5/compute/1369517) 5500 scores 41727, 41283 The 5300...
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KrazyKanuck said:
Great video! Sorry to steal your thunder! Question though, do your OpenCL results show 32 compute units instead of the expected 36. If so, do you know why this is? I noticed this when browsing through scores, that the OpenCL results for the 5300 show 20 CUs, the 5500 XT show 24 CUs, the 5700 XT show 40 CUs (all as expected), but the 5700 show 32 CUs. I don't know very much about these sorts of things, but it's struck me as odd that the benchmarks for the 5700 generally have it in the middle between the 5500 XT and the 5700 XT, or even closer to the 5500 XT. There should be 12 more compute units available in the 5700 and only an additional 4 in the 5700 XT. So I wonder if Geekbench isn't somehow recognizing all 36 CUs. See a little more information near the bottom of this thread:

forums.macrumors.com

Geekbench 5 iMac Metal Rough Comparisons - which card to get?

We've discussed this a bit in other threads and here's the first comparison I've been able to do for those wondering what to do owning a 580x iMac. 5700 16gb is 57898, 59417, 56291 5700 8gb scores 53232, 49344 (https://browser.geekbench.com/v5/compute/1369517) 5500 scores 41727, 41283 The 5300...
forums.macrumors.com forums.macrumors.com
Click to expand...

It's normal for the 5700 to be closer to the 5500XT. If you look at the official specs page, despite having 36 compute units, it has the lowest frequency out of all the cards by far, while the 5500XT's is the higest.

Official raw power TFLOPS number also points to it being closer to the 5500 than the 5700XT.

https://www.amd.com/en/graphics/radeon-apple-5000-series
 
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Azrael9 said:
Hello Voyageur,

I've posted in the Star Craft II software thread.

RE: the game crashing. It won't load. Even pressing the 'Options' button crashes it.

I don't know what the issue is. But if anyone can chime in with a solution.

I'm after benching SCII as per V's request.

I even brought Battle Front and SCII onto my main drive from external and that didn't change anything.

Can get a load screen for a campaign. Or Tutorial. Then the load bar freezes. The whole iMac just locks up.

Anybody got any thoughts? Any other SCII players out there know what's going on?

WoW works just fine. SCII is a mystery.

Azrael.
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Hello, Az
This is bad news, of course. But I am grateful to you for the work done, torment and for the time that you have given !!
 
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creativityrules said:
Can this be played on boot camp or via Parallels?
Click to expand...
Yes, it can. The game is multiplatform. On my old 2013 iMac, I successfully tried to run it in the bootcamp (+- the same in comparison with MacOS). I have never tried Parallels. I think it should work too, but I don't know about the performance.
 
wave84 said:
It's normal for the 5700 to be closer to the 5500XT. If you look at the official specs page, despite having 36 compute units, it has the lowest frequency out of all the cards by far, while the 5500XT's is the higest.

Official raw power TFLOPS number also points to it being closer to the 5500 than the 5700XT.

https://www.amd.com/en/graphics/radeon-apple-5000-series
Click to expand...
Thanks for the link.
All of them have 130 watt TGP, so is there any real difference in thermals?
 
filmak said:
Thanks for the link.
All of them have 130 watt TGP, so is there any real difference in thermals?
Click to expand...

Based on my hand calcs using the Geekbench OpenCL performance differences between the PC and Mac variant of 5700 vs 5700XT, the Pro 5700XT should be running at 166W vs 130W shown in the spec sheet link above. My calcs show the Pro 5700 is running at ~129W which grounds my calculation to published spec. The big caveat here is that the PC variant 5700XT has 8GB of VRAM vs 16GB VRAM on the Pro 5700XT. So it is entirely possible the higher VRAM is helping the Pro 5700XT achieve the performance increase with negligible penalty on thermals.
Looking at the Pro 5700 vs Pro 5700XT chip, they're identical except 5700 has locked CU and shading units. Probably binned by chip yield.
 
KrazyKanuck said:
Great video! Sorry to steal your thunder! Question though, do your OpenCL results show 32 compute units instead of the expected 36. If so, do you know why this is? I noticed this when browsing through scores, that the OpenCL results for the 5300 show 20 CUs, the 5500 XT show 24 CUs, the 5700 XT show 40 CUs (all as expected), but the 5700 show 32 CUs. I don't know very much about these sorts of things, but it's struck me as odd that the benchmarks for the 5700 generally have it in the middle between the 5500 XT and the 5700 XT, or even closer to the 5500 XT. There should be 12 more compute units available in the 5700 and only an additional 4 in the 5700 XT. So I wonder if Geekbench isn't somehow recognizing all 36 CUs. See a little more information near the bottom of this thread:

forums.macrumors.com

Geekbench 5 iMac Metal Rough Comparisons - which card to get?

We've discussed this a bit in other threads and here's the first comparison I've been able to do for those wondering what to do owning a 580x iMac. 5700 16gb is 57898, 59417, 56291 5700 8gb scores 53232, 49344 (https://browser.geekbench.com/v5/compute/1369517) 5500 scores 41727, 41283 The 5300...
forums.macrumors.com forums.macrumors.com
Click to expand...
Haha no I appreciate it.

With regards to the 32 compute units, I think that is an error as I checked gpuz in bootcamp and it shows the correct number of stream processors (2304 which is 36x64)
 
Voyageur said:
Hello, Az
This is bad news, of course. But I am grateful to you for the work done, torment and for the time that you have given !!
Click to expand...

Hello Voyageur,

Np. I was into double figures in the end with my attempts. And something was clearly wrong.

I eventually went to the Blizzard forums. And it seems like both PC and Mac users were having trouble logging into the game. Even after the game then 'patched' with was supposed to solve the issue? It still wouldn't work.

Blizzard games (and Battle Front's patching...) do seem to occasionally suffer from these system freezes or games not starting/loading properly.

Shame as I did want to give it a go and report back on the numbers.

I do feel, that anyone wanting to run SCII on a new iMac2020 will 'walk it.' The gpus are more than powerful enough.

If only evidence by my experience with WoW. HD and QHD are beyond my expectations of gaming on an iMac. That's refreshing. 4k was a revelation. And 5k...with some 'graphical 1-10' tweaking could also be done (I was in 89/90 fps territory on WoW at 5k.)

Blizzard tend to make their games perform as 'widely' as possible on specs.

So if anyone else can get SCII to work, I'd be interested in the fps you get at HD, QHD, 4k and 5k.

Regards,

Azrael.
 
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SWolfe said:
actually it looks like Apple finally righted that wrong in the 2020 iMac.

Honestly minus the body style this is the biggest upgrade since 2012.


SDXC card slot
Click to expand...

I didn't expect the SD card slot to get the boost. :). Happy about that.

And yes. This is the most substantial iMac upgrade since the one I got (Late 2012.)

Bar the design and cooling. This is a kick az update.

Azrael.
 
Unigine in Windows 10.
Annotation 2020-08-29 004905.png
 

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I just received mine and ran Geekbench. The RAM seems to make a BIG difference. With the 8GB of RAM, my fastest single score was 1280 and multi core was 8121. After I upgraded the RAM, my fastest single core went up to 1397 and multi core to 10100.
 
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Gaming on these machines, even with the 8-core, seems legit. I'm struggling a bit on what video card option to go with. It's quite a lot of money to go to the 5700 XT and doesn't seem to be entirely worth it. The FPS ratings are interesting but doesn't really matter once it's above 60, right?

Need someone to try out Flight Simulator 2020 on the 5500 XT and/or 5700. :)
 
ErikGrim said:
It's great on the 5700XT 16Gb. You can easily still make it drop to a slideshow by going ultra settings at 4 or 5K though. It's built to be future proof ;)
Click to expand...

I know I saw a good review on the 5700XT (maybe from you elsewhere!) but I don't want to pay that much so am hoping someone can show it runs great on ... medium? on the 5500 XT...
 
jwp2222 said:
I know I saw a good review on the 5700XT (maybe from you elsewhere!) but I don't want to pay that much so am hoping someone can show it runs great on ... medium? on the 5500 XT...
Click to expand...
It works great with MBP Radeon 5500M and Parallels Pro, 30 fps with high/max settings:

 
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iMac 8-core 5500 XT vs. Mac Pro 16-core Vega II. Jump to around 07:40.


 
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Hi, I thought I'd post some benchmarks as there aren't that many for the i7 with 5700. There's a few reasons why I didn't spend the extra on the 5700XT - I wanted a quiet computer, I don't paly games (have a switch and PS4 for that) and I only expect to keep this iMac for 3 to 4 years and then will switch once Apple Silicon transition has settled down. For my usage Lightroom/Photoshop for personal use and running virtual machines for work, the standard 5700 is probably more than enough.

Geekbench score was 1,270 single core and 8,771 multicore. My office is relatively quite at 30.5 dBA. The fans briefly kicked in towards the end of the run when the cpu temperature hit 90.5C but the noise only went up to 34.0 dBA very briefly. I reran it straightaway but couldn't get the fans to kick in this time., which was odd.

Cinebench score was 4,703 and this time I really managed to get the fans to kick in with a peak sound of 42.8 dBA. I reran it a couple of times and the fans kick in just beyond 90C but did see a maximum cpu termperature of 99.2C. For comparison my 2012 i7 iMac peaked at 35.4 dBA, so quite a bit louder when the fans kick in.

Finally for geekbench gpu testing I got 44,812 in OpenCL and 52,439 in metal. No fans kicked in so stayed at the same base sound level of 30.5 dBA. Note all sound levels were taken at 18 inches (about 46cm) from the front of the mac and my iMac has 64GB memory.

I hope that helps when deciding on what spec to go for if you haven't alreay ordered.
 
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