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There are a lot of threads on MacRumors. I stopped counting when I reached a million.

Have you actually tried Installing mismatched RAM on a 2020? If so, what did you find?

The last time I ran into this situation was with a 2010 about 8 months ago. The slots that worked best (in this case, at all) for mismatched RAM were not the ones shown in the Apple support pages or in the 2011s I’ve worked on. It was a surprise.
See here for example. You cannot have both 3rd party RAM and Apple RAM without losing either speed or dual channel (in this 2020 iMac!). There are way too many people reporting this... Not sure why you keep ignoring all these reports...
 
See here for example. You cannot have both 3rd party RAM and Apple RAM without losing either speed or dual channel (in this 2020 iMac!). There are way too many people reporting this... Not sure why you keep ignoring all these reports...
That’s easy. It’s hard to ignore something I had never seen. I had asked for links and you finally posted one. Thanks.

The person who kept arguing and insulting me was reporting kernel panics that he was blaming on mismatched RAM. He kept harranging me for not paying attention to all the videos and reports on that (still none that I can find) but never posted a link. He never mentioned the dual channel issue in his nonsense rants, BTW.

Dual channel is not an issue for me — ok, not for me personally since an iMac Pro is quad channel. For my education clients and their uses, the ability to have more apps open far outweighs an extra 500-1000 points on a Geekbench score. I can write a few pages on this issue but it’s a bit off-topic for this thread.

So, while I now understand the issue, I do not agree with the armchair experts who rely on Geekbench scores to form opinions. I feel that having 40GB installed per the 9to5 instructions is superior to the slight speed advantage of keeping the 8GB sticks in a drawer — for most users. There might be an advantage for gaming but I don’t do that and don’t pay attention to that world. My clients make their livings on their Macs as do I.

My heavy lifting is audio and AV. Although I really like the new 2020 iMacs for my school teacher clients and my wife, I’ve seen nothing that would make me want to give up my iMac Pro for one. If the iMP gets an option bump to the nano-glass and 8TB onboard, I’ll place that order. Day one.
 
That’s easy. It’s hard to ignore something I had never seen. I had asked for links and you finally posted one. Thanks.

The person who kept arguing and insulting me was reporting kernel panics that he was blaming on mismatched RAM. He kept harranging me for not paying attention to all the videos and reports on that (still none that I can find) but never posted a link. He never mentioned the dual channel issue in his nonsense rants, BTW.

Dual channel is not an issue for me — ok, not for me personally since an iMac Pro is quad channel. For my education clients and their uses, the ability to have more apps open far outweighs an extra 500-1000 points on a Geekbench score. I can write a few pages on this issue but it’s a bit off-topic for this thread.

So, while I now understand the issue, I do not agree with the armchair experts who rely on Geekbench scores to form opinions. I feel that having 40GB installed per the 9to5 instructions is superior to the slight speed advantage of keeping the 8GB sticks in a drawer — for most users. There might be an advantage for gaming but I don’t do that and don’t pay attention to that world. My clients make their livings on their Macs as do I.

My heavy lifting is audio and AV. Although I really like the new 2020 iMacs for my school teacher clients and my wife, I’ve seen nothing that would make me want to give up my iMac Pro for one. If the iMP gets an option bump to the nano-glass and 8TB onboard, I’ll place that order. Day one.


Wow nonsense rants that turn out to be true. And wow another statement that everyone using Geekbench is armchair pro. You feel that having 40GB is better, how about knowing? I had a couple of kernel panics seemingly related to the ram, they seemed to have gone away as I haven’t had any since (i dont know their cause and it wasn’t the issue i was trying to fix anyways). It was not because of putting in the ram incorrectly though as even me being an ARM chair pro I can manage that. You only ever responded with telling me I needed to read some instructions or call OWC when that wasn’t the issue. This was insulting.

But hey you know i wanted to do a little gaming on my machine so who cares that is a world that doesnt matter. The real world is me being a ”creative” over charging clients for BS work to pay for my 10k computer, then telling people they can fix every issue by following some instructions that were not pertinent to the issue they were actually having. By the way i didn't need to post a link it was all over the threads we exchanged words in all you had to do was actually read.
 
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I have been trying to find benchmarks for the 8Gb 5700 option without success. Has anyone found benchmarks comparing all three of the GPU options on the high end model?
 
Passmark benchmark in Bootcamp of 12443. i7, Pro 5700 XT, self-installed 32GB ram, 2TB SSD.

3D graphics are predictably below most RX 5700 XT scores (of about 16500) but not bad at all. The Radeon drivers are 19.50 which are a bit out of a date unfortunately. I was really hoping that brand new card would see brand new drivers.. Biggest question mark for me is whether/when/if AMD updates the drivers to v20 (which should see a bunch of gains).


IMG_0941.jpeg
 
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Looks like this panned out to what everyone suspected. Middle option makes no sense(unless there was some big sale on it in the future)
This is a well-known marketing trick.
By providing a middle option that is apparently relatively poor value, you are sucked in to paying "just a little more" ($200) for the top option. If no middle option were provided, less people would opt for the top option, as it would be perceived as a bigger (single) price increment ($500) over the base option.
Which is fine, as long as you realize what is going on
 
Looks like this panned out to what everyone suspected. Middle option makes no sense(unless there was some big sale on it in the future)
I'd wait to see more benchmarks. The numbers are well below where I'd expect them to be. On the desktop the 5700 is around 10% slower than the 5700XT. This is a much bigger gap.
 
Waiting to hear your results. What will you do for memory?

I am seeing roughly a ~35% bump in performance with X-Plane 11.41. I was getting about 40 FPS with my 9900K and Vega 48 iMac and seeing about 60 FPS on the 10700K and 5700 XT with the same settings.


Also ran geekbench.....


Screen Shot 2020-08-20 at 10.05.28 PM.png
 
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His benchmark was from a i9. 2TB speed on the i7 may possible be slower in general. I only have one data point.
My 2TB SSD is about 200MB/s slower on both read and write.

I'll buy the i9 2tb version, so his test is ok, but thank you :)
there also seem to be different speeds depending on the size of the ssd.
 
Passmark benchmark in Bootcamp of 12443. i7, Pro 5700 XT, self-installed 32GB ram, 2TB SSD.

3D graphics are predictably below most RX 5700 XT scores (of about 16500) but not bad at all. The Radeon drivers are 19.50 which are a bit out of a date unfortunately. I was really hoping that brand new card would see brand new drivers.. Biggest question mark for me is whether/when/if AMD updates the drivers to v20 (which should see a bunch of gains).


View attachment 945993

can you not update the drivers yourself?
 
Passmark benchmark in Bootcamp of 12443. i7, Pro 5700 XT, self-installed 32GB ram, 2TB SSD.

3D graphics are predictably below most RX 5700 XT scores (of about 16500) but not bad at all. The Radeon drivers are 19.50 which are a bit out of a date unfortunately. I was really hoping that brand new card would see brand new drivers.. Biggest question mark for me is whether/when/if AMD updates the drivers to v20 (which should see a bunch of gains).


View attachment 945993

That's a point. Driver updates for this card. Be nice to see some % gains.

For a 5700XT variant in such an AiO enclosure. This card has brought enlightened gpu performance to the consumer iMac.

Azrael.
 
can you not update the drivers yourself?

Unfortunately, that's not an option. The windows drivers for Pro video cards are not kept as up to date as consumer cards (which are v20 Adrenalin). The Adrenalin drivers don't support the Pro 5700 XT (won't install). There are third-party modded drivers that can upgrade them, but in my experience you either get a 5% bump *or* you get a broken driver build and no way to fix it.
 
Unfortunately, that's not an option. The windows drivers for Pro video cards are not kept as up to date as consumer cards (which are v20 Adrenalin). The Adrenalin drivers don't support the Pro 5700 XT (won't install). There are third-party modded drivers that can upgrade them, but in my experience you either get a 5% bump *or* you get a broken driver build and no way to fix it.

Which is why I miss NVIDIA. :( I could keep the windows drivers up to date with my 780M.
 
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my first 2020 27" was a dud with multiple KP errors and screen freezes. It has been sent back and my 2nd unit arrived on Wednesday. So far it had been flawless until earlier this morning. The sound stopped working. Nothing was muted and the sound settings were the default. I just finished the supplemental update and after that plus the restart, the sound is working again.

I really hope this isn't a sign that I have another dud on my hands. I hope it's just the fact that Catalina sucks or it's just a random bug that won't occur again.
 
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None of yours were.

I do not understand your obsession with my posts seeing that you distort them at every opportunity. it seems that my biggest offense in your mind is that I charge for my services when working on a Mac.

Wrong my non sense rant was exactly true and many other had the same issue. Working on a Mac is following instructions from 9 to 5 Mac? Anyways I’m done with this convo you just selectively read whatever you want. No hard feelings, is what it is.
 
my first 2020 27" was a dud with multiple KP errors and screen freezes. It has been sent back and my 2nd unit arrived on Wednesday. So far it had been flawless until earlier this morning. The sound stopped working. Nothing was muted and the sound settings were the default. I just finished the supplemental update and after that plus the restart, the sound is working again.

I really hope this isn't a sign that I have another dud on my hands. I hope it's just the fact that Catalina sucks or it's just a random bug that won't occur again.
I wouldn't put it past Catalina. I've had two outright system crashes but they were in game while in Bootcamp. MacOs has been flawless so far but Catalina on my 21" 2017 4K iMac would sometimes behave oddly as you describe above, making me think it was broken, when in fact Apple just lazily shipped and never fixed a broken OS last year. Boy oh boy, I hope your second iMac is alright or we're all gonna be having to watch the health of our machines a lot closer as two lemons in a row would be a real bad sign.
 
4TB

Black Magic speed test

2970 write
2647 Read


I thought the read score would be better on a 4TB SSD
 
I've tried World of Warcraft (hello Blizzard and WoW fans...) and it's a 'big ask' for anything beyond 1440p.

1080 and 1440p (HD and QHD) are rock solid. 100FPS+. At Level 5, Smooth as butter. On WoW graphics 10? Rock solid.

I tried 4k. I couldn't really see the fidelity difference (WoW is what it is. A cartoony style MMO.)
I tried 5k. Problems. 15 fps. WoW L10. 100% scaling. Fans were going. System struggling.
Hello, Az!

Could you give me a Starcraft benchmark, pleeeease?:)
Finally set up my 8 core i7 with the 5700 XT 16Gb. XCOM 2 is indeed laughably unoptimised. 5K it runs 10-15fps at Maximum. But I've found if you dial down a couple of sane settings (no AA, directional shadows etc.), I can get a very enjoyable ~40fps at 4K. Especially since I've been gaming 2000+ hours on the 5-20fps on 1440p low settings on my 2014 5K iMac.
I didn't expect to get a similar review on XCOM 2, thanks a lot! This is very good news.
XCOM 2 and Chimera Squad on windows is smooth as butter in 5k with sane settings
Any fps in bootcamp mode please?

Why don't you just use 1440p as resolution? Even a 2080 Ti can't do solid 5K gaming, but scaling to exactly half of 5K should give good results and should still look awesome. Would be intersting to see some 1440p results.
I also always try to play at the native resolution of the monitor, even if it's 25-30 frames, not 50-60. It looks much better that way.
 
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