2018 Mini slower after RAM upgrade? More thermal throttling than usual?

[mono-kai]

Hi there, I got my Mac mini in February and am very happy with it. Got the i7 and upgraded from 16GB to 32GB RAM.
I ran Cinebench R20 and got 2700-3100 and on an Logic X stresstest (Newlogicbenchmarktest) 81 Tracks. After upgrading to 32GB and about 2 weeks later I ran Cinebench (only around 2250)/Geekbench (around 5000)/Logic Benchmarks (61 Tracks) and the results were 20% less. In Cinebench cores run at 2,7-2,9 GHz, so slower than on other tests I've seen. Tested on different days and also at various temperatures.
Could the new Ram be the problem? It was installed by an Apple certified dealer, so I figure they know how/which to install.

I ran diagnostic, did PRAM/SRC reset and also tried the tests with a new user account to exclude threads from the main user. Didn't change anything at all.

Anyone experienced similar problems?
Thanks in advance

 

[D.T.]

Can you confirm the part number for the RAM modules they used?

 

[mono-kai]

It's two Samsung M471A2K43CB1-CTD 16 GB DDR4 2667MHz modules, both seemingly OK.

 

[a2jack]

It's two Samsung M471A2K43CB1-CTD 16 GB DDR4 2667MHz modules, both seemingly OK.

So that is the "new" Ram. What was already in there ? Do the 2667mh frequencies match?

 

[mono-kai]

The old Ram was two Sk Hynix hma81gs6cjr8n-vk 8 GB 2666mhz, but if you google the Samsung ram it also says 2666 MHz. Could this be a problem? Why does it display 2667mhz in my settings?

 

[getrealbro]

FWIW I downloaded Cinebench R20 and ran the test on my 2018 i7 Mini w/ 32GB of Crucial 32GB DDR4 2666 MHz SODIMM Memory Module Kit (2 x 16GB). It ranked 6th scoring 2740 pts.

I have included a few screen dumps of Intel Power Gadget and Activity Monitor’s CPU History taken during the Cinebench test. Note: the time scales of the Intel Power Gadget and CPU History graphs are close but not the same.

GetRealBro

I

 

[D.T.]

For reference: Cinebench 2695 and Geekbench 5401 for my '18 32GB with OEM RAM.

If it's significant, that's running while in full production/operational mode, i.e., a WIn10 VM running MS-SQL, VS, IIS, and MacOS running (the VM itself) and Mail, Postman, Sketch, Notes, iTunes, Chrome (20-25 tabs), Messages, several services.

 

[mono-kai]

Thank you guys for checking! I guess there is something wrong with my Mini. Will try a clean install and see if this helps. Then swap the Ram