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davidm5

macrumors newbie
Original poster
Nov 4, 2012
14
5
Toronto
I just picked up a new 27" Imac with the 3.6ghz 8 core i9 and 1tb SSD with the Radeon Pro 580X 8 GB.
I added 2 X 16 gb Ram from OWC for a total of 40Gb ram.

My Geekbench score of 6400-6900 is quite low compared to what others are getting at the 8200+ range for the multicore score.
My single core score is 1200-1320 which is within the range of what others are getting.

Do I have a defective machine?
Should I return it while I still can and try another one?
 

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tlaw81

macrumors member
Oct 31, 2010
96
35
North Carolina
How long did you have it set up? Could it be that the background process is to set up the machine are still going? Like syncing emails iCloud settings etc.?
 

davidm5

macrumors newbie
Original poster
Nov 4, 2012
14
5
Toronto
@tlaw81 It was done over quite some time including rebooting and swapping out the ram to see if it was a ram issue. I have the 2 original 4gb Apple sticks plus 2 X 16gb OWC sticks. Results are pretty much the same. Even tried running the test with the Imac on 'safe' mode. I am going to try it again to see if the ram position makes a difference.
 

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davidm5

macrumors newbie
Original poster
Nov 4, 2012
14
5
Toronto
Solved! It was the ram slot position!
On an hunch, I decided to try swapping the positions of the ram sticks and the Geekbench score went from mid 6000s to almost 8000!

Didn't think the ram position would have made such a difference.
 

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rstsauveur

macrumors newbie
Oct 23, 2018
12
4
Solved! It was the ram slot position!
On an hunch, I decided to try swapping the positions of the ram sticks and the Geekbench score went from mid 6000s to almost 8000!

Didn't think the ram position would have made such a difference.
What position did you change to?
 

davidm5

macrumors newbie
Original poster
Nov 4, 2012
14
5
Toronto
I changed the ram position from:
Screen Shot 2020-01-16 at 2.57.35 PM.png

to this:
Screen Shot 2020-01-18 at 12.27.33 PM.png

Being dual channel memory, the DIMMs have to be on both channels A & B.
This is for my situation because I am using the 2 original 4GB Apple RAM and 2 OWC 16GB RAM. If you are using 4 identical RAM, then it probably will not matter.
 
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davidm5

macrumors newbie
Original poster
Nov 4, 2012
14
5
Toronto
That's a good question...LOL.
During the install, I pulled out the existing RAM and then put them all back, I guess not in the optimal position originally. It's all good now. Lesson learned.
 
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