What MHz does it report if you just put two of the sticks in? (Say in slots 2 and 4).
Novabench GPU and Disk scores are not reliable/meaningful, ignore them. Use Geekbench 5 Compute for GPU, and Blackmagic for disk tests.So I installed second 32 GB stick this morning and generally, all seems fine.
For a better overview, Novabench:
40 GB (8+32)
Score: 2957
CPU: 1570
GPU: 911
Disk: 181
RAM: 295 @17978 MB/s
Geekbench 5: 1245/7310
32 GB
Score: 2994 (!)
CPU: 1612 (!)
GPU: 915
Disk: 186
RAM: 281 @17841 MB/s
Geekbench 5: 1322/7071
64 GB (32+32)
Score: 3109
CPU: 1629
GPU: 954
Disk: 168
RAM: 358 @27923 MB/s
Geekbench 5: 1383/8848
Other than sudden drop in SSD performance (why???) I am happy camper.
What's interesting here, the GPU seems to have gotten some room to breathe
Anyone knows what is 1333 Mhz Geekbench about? I got the same result with same specs.
Bus frequency 1333 MHz times DDR (Double Data Rate) gives 2667 MHz data rate.
Always run that test twice and believe the second result. Often, the first test on an SSD will give terrible results and a second one done immediately after will be correct. If both tests are equally bad, there's a problem but, with new hardware, it can sometimes be the test.
Well, you were right. Someone at this company screwed up. Sticks say 2666 but when installed are 2400. Guess it's time to ship it back to Amazon. Is this common? Thanks for the suggestions. I'm not sure I'm going to stick with 64gb anyway. Is there a significant performance difference between 24gb, 32gb or 64gb configured properly?
.Thanks.. Missed that one. Appreciate it.I suggested 2400 even before Wilberforce
32 GB seems to more than enough and best bang for the buck.
32GB is plenty for most people. 64GB or more is usually needed for those with special needs, such as lots of video editing, want to have hundreds of Chrome tabs open, virtualization, etc. Getting 2x16GB leaves the option open of adding another 2x16GB in the future.
I have good experiences with Timetec. Upgraded 4 iMacs. They are all still running fine. In Europe these modules are cheaper than Crucial. I have read some horror stories about OWC, but their aftersales seems to be very good.32GB is plenty for most people. 64GB or more is usually needed for those with special needs, such as lots of video editing, want to have hundreds of Chrome tabs open, virtualization, etc. Getting 2x16GB leaves the option open of adding another 2x16GB in the future.
I agree, Max Tech does a pretty good job showing what you gain from different amounts of RAM.
Kuesuny is not a brand I am familiar with.
Crucial has the best reputation, but also is a bit more expensive.
I also tested Timetec and found no discernible difference between it and Crucial.
Others swear by OWC, but there have been reports of kernel panics on 2020 iMac using OWC RAM, but this may be just unfair coincidence.
Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) CL19 DR x8 SODIMM 260-Pin for Mac - CT2K16G4S266M
CT2K16G4S266M is a 32GB Kit consisting of (2) 16GB Dual Ranked DDR4 SODIMM modules that operates at speeds up to 2666 MT/s and has a CL19 latency. It is an Unbuffered SODIMM. It conforms to the industry standard DDR4 SODIMM layout of 260 pins and is compatible with systems that take DDR4 2666MT/s...www.amazon.com
Timetec 32GB KIT(2x16GB) Compatible for Apple DDR4 2666MHz / 2667MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini (8,1) PC4-21333 /PC4-21300 MAC RAM
Timetec – Memory of a lifetime Compatible with (But not Limited to): *Please click image for more compatible systems model Need to know if this part is compatible? Contact us with manufacturer and model information of your motherboardwww.amazon.com
As you can see, your RAM isn’t working at full speed (2133 MHz instead of 2666 MHz) because you have mismatched RAM sticks.
Nope. It won't do any harm ever.
