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iMac 27" 2019 vs 2020 !!!! Test ! Vega 48 vs Radeon Pro 5700

Shaman777

Shaman777

macrumors newbie
Original poster
Jul 30, 2020
26
4
iMac 27 "2019 vs 2020 !!!!

Video test

iMac (Retina 5K, 27-inch, 2019) 3.6 GHz 8-core Intel Core I9 processor 64GB 2667 MHz DDR4 Radeon Pro Vega 48 8GB
osx 10.15.6


iMac (Retina 5K, 27-inch, 2020) 3.6 GHz 10-core Intel Core I9 processor 64GB 2667 MHz DDR4 AMD Radeon Pro 5700 XT 16GB
osx 10.15.6

Снимок экрана 2020-09-02 в 03.47.00.png
 
Last edited:
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The novabench GPU test is not sensitive enough to detect more than 60 frames per second-- and that doesn't require a capable GPU. My imac of 5 years ago also scores 558 on GPU.
 
jerwin said:
The novabench GPU test is not sensitive enough to detect more than 60 frames per second-- and that doesn't require a capable GPU. My imac of 5 years ago also scores 558 on GPU.
Click to expand...
👌
 
I am an architect working in 3D programs, including live 3D walk thru's with clients (similar to a first person gaming experience). I also now record these and edit the film later. Single speed CPU which is where I spend 90% of my day is hardly changed, but faster write speed and film editing both get a decent boost. Extra bells and whistles (1080p camera, speakers, etc). are nice bonus, but not enough to sway me to upgrade. This seems like a worthy upgrade, enough to sell my 2019 8 core i9 Vega 48 and upgrade to the 2020 10 core i9 with 5700XT. Would you concur?
 
boulderarch said:
I am an architect working in 3D programs, including live 3D walk thru's with clients (similar to a first person gaming experience). I also now record these and edit the film later. Single speed CPU which is where I spend 90% of my day is hardly changed, but faster write speed and film editing both get a decent boost. Extra bells and whistles (1080p camera, speakers, etc). are nice bonus, but not enough to sway me to upgrade. This seems like a worthy upgrade, enough to sell my 2019 8 core i9 Vega 48 and upgrade to the 2020 10 core i9 with 5700XT. Would you concur?
Click to expand...

I brought my 2020 back, this is Apple's biggest mistake, I left my 2019 8-core i9 Vega 48, bought a c920 webcam and absolutely satisfied. To get an idea of how paltry a 2020 10-core i9 is with 5700XT, watch this video IMac 2019 vs 2020 !!!! it's in Russian, but you can enable subtitles, I made a very detailed comparison, you will be shocked by the direct comparison of 2019 and 2020
 
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[QUOTE = "Shaman777, сообщение: 28983627, участник: 1227088"]
Я вернул свой 2020 год, это самая большая ошибка Apple, я оставил свой 8-ядерный i9 Vega 48 2019 года, купил веб-камеру c920 и абсолютно доволен. Чтобы получить представление о том, насколько ничтожен 10-ядерный i9 2020 года с 5700XT, посмотрите это видео: IMac 2019 vs 2020 !!!! он на русском, но вы можете включить субтитры, я провел очень подробное сравнение, вы будете шокированы прямым сравнением 2019 и 2020 годов
[/ QUOTE]
Спасибо за шикарное видео !!!
 
I wouldn't replace a 2019 computer for a 2020 computer unless it literally imploded before my eyes. If the performance boost from 2019 to 2020 is enough to sway you to even think about it, it means as soon as those ARM Macs come knocking you will be the first to replace whatever you have to get it.

You got money to burn, go for it... but logically it makes no sense to replace a computer every year.
 
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lapot said:
[QUOTE = "Shaman777, сообщение: 28983627, участник: 1227088"]
Я вернул свой 2020 год, это самая большая ошибка Apple, я оставил свой 8-ядерный i9 Vega 48 2019 года, купил веб-камеру c920 и абсолютно доволен. Чтобы получить представление о том, насколько ничтожен 10-ядерный i9 2020 года с 5700XT, посмотрите это видео: IMac 2019 vs 2020 !!!! он на русском, но вы можете включить субтитры, я провел очень подробное сравнение, вы будете шокированы прямым сравнением 2019 и 2020 годов
[/ QUOTE]
Спасибо за шикарное видео !!!
Click to expand...
Всегда пжл )
 
pmiles said:
I wouldn't replace a 2019 computer for a 2020 computer unless it literally imploded before my eyes. If the performance boost from 2019 to 2020 is enough to sway you to even think about it, it means as soon as those ARM Macs come knocking you will be the first to replace whatever you have to get it.

You got money to burn, go for it... but logically it makes no sense to replace a computer every year.
Click to expand...
I agree
 
Shaman777 said:
I brought my 2020 back, this is Apple's biggest mistake, I left my 2019 8-core i9 Vega 48, bought a c920 webcam and absolutely satisfied. To get an idea of how paltry a 2020 10-core i9 is with 5700XT, watch this video IMac 2019 vs 2020 !!!! it's in Russian, but you can enable subtitles, I made a very detailed comparison, you will be shocked by the direct comparison of 2019 and 2020
Click to expand...
I don't understand why you would want to throw your machine over for a new one a year later? What would be the point of that? You lose so much money in the process that it makes no financial sense whatsoever for any performance gains.
 
AZREOSpecialist said:
I don't understand why you would want to throw your machine over for a new one a year later? What would be the point of that? You lose so much money in the process that it makes no financial sense whatsoever for any performance gains.
Click to expand...

I frequent auto forums, some ppl do the same thing with cars
 
Does anyone know the exact specs for the SSD used in 2019 and 2020 iMacs? What changed that gave the dramatic bump in speed?
 
BimmerM said:
Any sources to this (speed tests), as I'm trying to decide between a 2019 and 2020 model ?
According to online tests, they both seem to boost around 2.500 write/read (blackmagic).
Click to expand...

Are you kidding? Why would you even consider the 2019 (unless you can get it for less than half the price of a similar 2020)?
 
hoodafoo said:
Are you kidding? Why would you even consider the 2019 (unless you can get it for less than half the price of a similar 2020)?
Click to expand...

Actually for several reasons.
The main reason is the bad reputation of the T2 chip reliability, along with several GPU glitches on the 2020 27" model.
There doesn't seem to be similar problems with 2019 model.
Besides that, I must say, I'm not a fan of the soldered nvm SSD.
I did however consider the 2020 model for a while, question is, if I'm willing to the take the risk with it.
 
I'm absolutely disapointed about iMac 2020 SSD performace, in particular with random write speeds. I have 2 Tb SSD (1 Tb for macOS, 1 Tb for Win10). I have also Dell OptiPlex 7770 4K with some "non-brand" SK hynix SSD. I started to notice, that my Dell outperforms iMac when it comes to disk intensive tasks. As I work with big data, I created couple of SQL tests, and it turned out, that the same task Dell performs much faster, like 50K records/per second vs iMac 22K records per second written to the database. Dell was on average 2.5 times faster on every task. I dig deeper and it turned out that iMac SSD sucks at random write speeds. And there is nothing you can do about that.
Dell OptiPlex 7770, 4K 27'', i7-9700, 16Gb RAM, 512 Gb SSD and iMac 5K 2020, i7-10700, 64Gb RAM, 2Tb SSD, 5700 8Gb.
iMac's SSD speeds in Crystaldiskmark.
 

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Fosdyke said:
I'm absolutely disapointed about iMac 2020 SSD performace, in particular with random write speeds. I have 2 Tb SSD (1 Tb for macOS, 1 Tb for Win10). I have also Dell OptiPlex 7770 4K with some "non-brand" SK hynix SSD. I started to notice, that my Dell outperforms iMac when it comes to disk intensive tasks. As I work with big data, I created couple of SQL tests, and it turned out, that the same task Dell performs much faster, like 50K records/per second vs iMac 22K records per second written to the database. Dell was on average 2.5 times faster on every task. I dig deeper and it turned out that iMac SSD sucks at random write speeds. And there is nothing you can do about that.
Dell OptiPlex 7770, 4K 27'', i7-9700, 16Gb RAM, 512 Gb SSD and iMac 5K 2020, i7-10700, 64Gb RAM, 2Tb SSD, 5700 8Gb.
iMac's SSD speeds in Crystaldiskmark.
Click to expand...

I suppose, if the SSD was replaceable in the iMac 2020, swapping another brand in the PCIe slot, such as Samsung 970 would make a much better result?
 
BimmerM said:
I suppose, if the SSD was replaceable in the iMac 2020, swapping another brand in the PCIe slot, such as Samsung 970 would make a much better result?
Click to expand...
When I started to explore this matter more deeply, to my surprise, those SK hynix SSD's when it comes to small file random reads/writes, they even outperforms latest Samsung 980 Pro SSD's
 
BimmerM said:
I suppose, if the SSD was replaceable in the iMac 2020, swapping another brand in the PCIe slot, such as Samsung 970 would make a much better result?
Click to expand...
Perhaps you could try a thunderbolt SSD with a high performance NVME drive of your choosing?
 
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