tag:support.primatelabs.com,2011-01-31:/discussions/geekbench/27316-discrepancy-between-gb3-and-gb4-on-multi-processor-macPrimate Labs: Discussion 2018-05-11T17:32:38Ztag:support.primatelabs.com,2011-01-31:Comment/452582032018-05-10T09:32:28Z2018-05-10T09:32:29ZDiscrepancy between GB3 and GB4 on multi-processor Mac<div><p>Apologies.<br>
My SpellWrecker entered an incorrect email address so I'm reposting with the correct address.</p>
<p>I've got a Mac Pro 5,1 with 2 Xeon x5680 CPUs for a total of 12 cores.<br>
Everything checks out fine on Apple's hardware diagnostic software.<br>
I realize that the results in GB3 and GB4 won't be the same but I question the ratio of single core and multi-core scores.<br>
GB3 shows 2714 (single) 30184 (multi) about 11X faster and what I would expect<br>
GB4 shows 2729 (single) 17603 (multi) only 6.5X faster!!<br>
Cinebench R15 shows 108 (single) 1560 (multiple) on the CPU rendering test about 14X faster<br>
Checking other results cited in MacTracker for this 12-core model I see a similar ratio of about 6 between single and multi-core GB4 tests.<br>
This makes me wonder of GB4 is seeing and measuring only 1 of the CPUs while GB3 and Cinebench are measuring both CPUs.</p>
<p>I'd really appreciate any help clearing this up.<br>
Thanks.</p></div>Pattag:support.primatelabs.com,2011-01-31:Comment/452582032018-05-10T16:50:08Z2018-05-10T16:50:08ZDiscrepancy between GB3 and GB4 on multi-processor Mac<div><p>Hi Pat,</p>
<p>Thanks for posting. I'd like to take a closer look at what is showing up on your Geekbench 4 result.</p>
<p>If you have uploaded it to the Geekbench Browser, could you post a link to the Geekbench 4 result for your system? If you haven't uploaded it there, could you attach it here?</p>
<p>Thanks,</p>
<p>Sarah<br>
Primate Labs Inc.</p></div>Sarahtag:support.primatelabs.com,2011-01-31:Comment/452582032018-05-10T22:42:38Z2018-05-10T22:42:40ZDiscrepancy between GB3 and GB4 on multi-processor Mac<div><p>Hi Sarah,<br>
Here are GB3 and GB4 results for this machine.</p>
<p>(Oddly enough, your server objected to the formatting and suggested zipping.) thanks,<br>
Pat</p></div>Pattag:support.primatelabs.com,2011-01-31:Comment/452582032018-05-11T17:32:37Z2018-05-11T17:32:37ZDiscrepancy between GB3 and GB4 on multi-processor Mac<div><p>Hi Pat,</p>
<p>Thanks for sharing the results. According to the Geekbench 4 result, it appears that the multi-core CPU benchmark is measuring the performance of all of your device's cores (i.e. the cores from both processors). How the multi-core score compares to the single-core score depends on a few factors, including how the processor schedules tasks between cores and how much communication between cores is required.</p>
<p>These search results in the Geekbench Browser might be useful for you to compare your device to other similar devices:<br>
<a href="https://browser.geekbench.com/v4/cpu/search?utf8=%E2%9C%93&q=macpro5%2C1+X5680+cores%3A12">https://browser.geekbench.com/v4/cpu/search?utf8=✓&q=macpro5%2C...</a></p>
<p>Geekbench 3 scores and Geekbench 4 scores are not comparable mainly because the two differ in terms of workloads used during the benchmark, and so scores are determined differently. The multi-core benchmark in Geekbench 4 has changed as well, so it is possible that a GB4 multi-core score would differ more than a GB4 single-core score would to the GB3 scores.</p>
<p>If your device supports both, I would suggest using a Geekbench 4 benchmark as it has been updated to measure more accurately, and to measure more relevant performance characteristics.</p>
<p>I hope that helps clarify things! Let me know if you have any further questions or concerns.</p>
<p>Warm regards,</p>
<p>Sarah<br>
Primate Labs Inc.</p></div>Sarah