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I did and found a solution. The RAM were in the wrong slots.
I put the two 16gb in bank 0 and the two 4gb in bank 1 and the Geekbench 5 result went up to almost 8000.
 
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Another iMac results from my wife's; 2017 4K model with 8gb ram / i5-7400 cpu / 2gb radeon pro 555 / 1tb sata hdd

SC: 871
MC: 3155
Metal: 15274
OpenCL: 13427
 
Last year I bought an iMac 2019 i9 Vega 48, 40 GB RAM. Close to €4000. Its GB5 results:

Single/Multi/OpenCL: 1287/8029/48243

I recently bought a modular N970TC Clevo laptop (i7 9700, 64GB RAM, GTX 1660 ti). €1400. GB5 results:

Single/Multi/OpenCL: 1298/7797/63476


The iMac runs hotter and noisier that the Clevo under the same load. Due to a factory problem the iMac failed and I returned it to getting my money back. I upgraded the laptop storage from 1.5 to 3TB of fast SSD nvme in 3 minutes.
 
Another iMac results after I sold my 5k 2017 and got the base model 2019 5k with 8gb ram / i5-8500 / 4gb radeon pro 570x / 1tb nvme external tb3 ssd

SC: 1015
MC: 4757
Metal: 29481
OpenCL: 24847

Edit: I've just added 2x4gb ram to this iMac and the results increased more than I expected.

SC: 1026
MC: 5121
Metal: 30750
OpenCL: 28061
 
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I was trying to get some info for another thread and saw the new Geekbench was out and tested my bigMac, which is a 2009 upgraded to 5,1 and 144.0.0.0 Boot ROM so it boots from a 970 NVMe blade. I was pretty happy with the results. It‘s upgraded to a 12-core 3.33GHz with 48RAM and a Metal video card so it can run Mojave. As expected, the single core speed was pretty pathetic, 655, well below most of the posters, but the opposite was true with the multi core (for obvious reasons) at 6810. What I was really surprised about was the open CL score for the video card which is a Radeon RX 580 (8GB VRAM) and scored 43,416. It was more than double my GTX 1050ti (4GB VRAM) which stopped working with High Sierra.
 
As in signature, late 2015 21.5" 4K iMac, 3.3GHz quad i7, 2TB Fusion/16GB/1GB Intel GFX.

SC: 968
MC: 3637
Metal: 3136
OpenCL: 5271

...I hate Intel integrated graphics.
 
As in signature, late 2015 21.5" 4K iMac, 3.3GHz quad i7, 2TB Fusion/16GB/1GB Intel GFX.

SC: 968
MC: 3637
Metal: 3136
OpenCL: 5271

...I hate Intel integrated graphics.
Actually, that looks very good for the small i7, but it really only measures RAM and CPU. Neither your slow Fusion drive or your video card (on chip) are reflected in the top two numbers. I’ve never had a Fusion drive (except to separate it on a new iMac), so I don’t know it’s speed range. But even a SATA SSD can’t get to 600MB/s, and the NVMe blades are about 500% faster which are stock in the current iMacs. The other issue, as you pointed out, is the video card. VRAM with OpenCL or Metal is very important with all the non-compressible files with raster imagery. The problem is twofold. First of all, the “VRAM“ is being stolen from your RAM, which is very weak compared to actual VRAM which is in the card and is 2 generations faster than RAM. The second problem is that they never give you enough to make a big difference. From testing, it appears to me that OpenCL only just gets going with 1GB, but gets a lot better with 2 or more GB. So, without adding a video card, you are stuck with little help to get through a photo edit.
 
Actually, that looks very good for the small i7, but it really only measures RAM and CPU...

I believe the 2TB Fusion drives have more SSD space (128GB) and spin at 7200rpm, so that helps a bit compared to a slower 5400rpm drive. An NVMe blade would be nice, sure, but my 2TB minimum storage requirement makes it an expensive option unless I want to crack open my iMac myself (could, and have, but won't again).

The computer does well for my typical use cases, which are primarily high-res music AirPlay-ing, 4K Plex streaming, the occasional Photoshop file and some light gaming. My next iMac will likely be a 27" so I can have a dedicated graphics card again and keep 2TB+ of storage (no longer offered on a 21" in any config, baffling). Aiming for 4GB VRAM next time, too. We'll see what the rest of 2020 holds. I've got a major case of FOMO but a new iMac is very tempting.
 
I believe the 2TB Fusion drives have more SSD space (128GB) and spin at 7200rpm, so that helps a bit compared to a slower 5400rpm drive. An NVMe blade would be nice, sure, but my 2TB minimum storage requirement makes it an expensive option unless I want to crack open my iMac myself (could, and have, but won't again).

The computer does well for my typical use cases, which are primarily high-res music AirPlay-ing, 4K Plex streaming, the occasional Photoshop file and some light gaming. My next iMac will likely be a 27" so I can have a dedicated graphics card again and keep 2TB+ of storage (no longer offered on a 21" in any config, baffling). Aiming for 4GB VRAM next time, too. We'll see what the rest of 2020 holds. I've got a major case of FOMO but a new iMac is very tempting.
Hi Chris,
I don’t believe Fusion drives will be around too much longer if macOS stays on its current track of eliminating HDDs. The Fusion drives have also created problems with Mac latest OS File system, APFS (Essential for booting OS 10.14 or later). Also, as far as I can tell, you can use an external HDD at the same speeds as the internal SATA with Thunderbolt(TB), and about half the speed for actual USB3. It really depends on what those files are and how macOS uses them.
I currently use 500GB for my boot drives, and use separate drives for ALL data, so it’s always less than half full. Even with a lot of non- Apple software, my boot disks are never more than 100GB. This assures I have room for the OS swap file, PS & LR (Adobe) scratch disk, and never gets more than half full.
 
Hi Chris,
I don’t believe Fusion drives will be around too much longer if macOS stays on its current track of eliminating HDDs...
Fingers crossed SSD's are the only option in the future and are relatively affordable. I use Fusion only because I have to, currently. ;)
 
iMac Pro. Base model spec (3.2ghz 8-core, 32GB RAM, Vega 56).

Single core: 1111
Multi core: 8328
Open CL: 50847
Metal: 54115

And just for the heck of it, I installed a Vega 64 in a Razer Core X enclosure using TB3:
Open CL: 53976
Metal: 59481
 
Just got 2020 base model 5K iMac yesterday.
(i5-10500 cpu, Radeon Pro 5300 gpu and 4x4gb 2667 mhz ram, macOS 10.15.6)
The results were like this;

SC: 1064
MC: 6075
OpenCL: 36564
Metal: 36985
 
iMac (21.5-inch Late 2012)

500GB SSD, 16GB RAM, i7-3770S (Quad Core 3.1 GHz), NVIDIA GeForce GT 650M (512 MB)

SC: 861
MC: 3214
OpenCL: stops

OpenCL - well, used Geekbench 5 Beta on Big Sur beta with an unsupported 199,- € Device... :)
 
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Looking at the numbers I have to say that nothing has really changed in the last 5 years. The only difference really is in multicore because they kept increasing the number of cores. :)
Single core is relatively the same between 2015 and 2020. Bravo Intel :)
 
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2020 iMac | i7 3.8 | 5700XT 16GB | 64GB RAM

SC: 1359
MC: 8814

OpenCL: 55230

Metal: 57833
 
iMac 2011 27” i7, 24gb ram & Nvidia Quadro K4100M
Single : 792
Multi: 2902
Metal: 5319
OpenCL: 4068

iMac 2011 27” i5 2400, 24gb ram, HD6970m 2gb
Singe: 696
Multi: 2264

Hackintosh 9700k, 16gb 3200Mhz ram, RX580
Single: 1227
Multi: 7638
Metal: 53137
OpenCL: 45501
 
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