MP 1,1-5,1 RAM speed Testing program

[freddomseven]

Hi, so currently I have 4 x 4GB RAM modules in my 5,1 Mac Pro
Ive heard that just running three modules lets the RAM run in Triple channel mode and 50% faster
So, Id like to test RAM speeds with all four modules in, against just 3 modules in it
I just cant seem to find a RAM speed test program
Thanks guys

 

[Macschrauber]

Geekbench 4

 

[flyproductions]

lets the RAM run in Triple channel mode and 50% faster

I have some doubts for 50%. 20 to (max!) 30% sounds more realistic to me.

 

[freddomseven]

Geekbench 4

Thank you ??

 

[h9826790]

I have some doubts for 50%. 20 to (max!) 30% sounds more realistic to me.

That's taking about pure memory performance without cache under extreme scenario. Which never happen in real world (e.g. no real world application will disable cache).

In reality, the overall system performance difference is hardly noticeable (or even not measurable for most normal usage).

 

[Stex]

I ended up in this thread because I was also trying to assess whether to install 6x 16GB or 8x 16GB. I was aware of the triple-channel mode from all the various threads about the topic (yes, it has definitely come up many times and has been answered many many times!) But here I (newbie) go again - I am pasting the results from GB5 for both setups. Several results do end up being about 50% slower with the 8x 16gb. I know I know - GB5 is not at all a reliable benchmark for real world use, I used it as a quick way to test both setups before doing more extended actual use etc.

System Information
Operating System	macOS 11.2.2 (Build 20D80)
Model	MacPro5,1
Open Core	0.6.7

Processor Information
Name	Intel Xeon X5680
Topology	2 Processors, 12 Cores, 24 Threads
Identifier	Genuine Intel Family 6 Model 44 Stepping 2
Base Frequency	3.33 GHz
L1 Instruction Cache	32.0 KB x 6
L1 Data Cache	32.0 KB x 6
L2 Cache	256 KB x 6
L3 Cache	12.0 MB

RAM Modules Comparison GB5

RAM Modules	8 x 16GB DDR3 1333	6 x 16GB DDR3 1333
Multi-Core Score	5310	6731
*Crypto Score	2467	5783
Integer Score	5353	6642
Floating Point Score	5690	7083

RAM Modules	8 x 16GB DDR3 1333	6 x 16GB DDR3 1333
*AES-XTS	2467 4.20 GB/sec	5783 9.86 GB/sec
Text Compression	10024 50.7 MB/sec	10491 53.1 MB/sec
Image Compression	7612 360.1 Mpixels/sec	8473 400.8 Mpixels/sec
*Navigation	2158 6.09 MTE/sec	4564 12.9 MTE/sec
HTML5	6468 7.59 MElements/sec	6819 8.01 MElements/sec
SQLite	7653 2.40 Mrows/sec	7641 2.39 Mrows/sec
PDF Rendering	4400 238.8 Mpixels/sec	5531 300.2 Mpixels/sec
*Text Rendering	2992 953.2 KB/sec	4903 1.53 MB/sec
Clang	7583 59.1 Klines/sec	7742 60.3 Klines/sec
*Camera	4438 51.4 images/sec	5668 65.7 images/sec
N-Body Physics	5441 6.81 Mpairs/sec	5488 6.87 Mpairs/sec
Rigid Body Physics	12480 77316.3 FPS	12445 77100.9 FPS
Gaussian Blur	6665 366.4 Mpixels/sec	6759 371.5 Mpixels/sec
Face Detection	9071 69.8 images/sec	9012 69.4 images/sec
*Horizon Detection	5105 125.8 Mpixels/sec	8087 199.3 Mpixels/sec
*Image Inpainting	7284 357.3 Mpixels/sec	9786 480.1 Mpixels/sec
*HDR	9690 132.0 Mpixels/sec	13444 183.2 Mpixels/sec
Ray Tracing	9698 7.79 Mpixels/sec	9593 7.70 Mpixels/sec
Structure from Motion	5341 47.9 Kpixels/sec	5542 49.6 Kpixels/sec
*Speech Recognition	2224 71.1 Words/sec	4293 137.3 Words/sec
*Machine Learning	1187 45.9 images/sec	2229 86.1 images/sec

 

[bsbeamer]

If your applications can take advantage of more RAM, use it. Any minor speed differences are easily made up for with the additional capacity.