My current computer, a late 2015 iMac 27 has a 4 GHz Core i7 processor, 32 GB RAM, 3 TB Fusion drive, and Radeon R9 M395X with 4 GB VRAM, Retina display. What kind of speedup with Mathematica, if any, might I expect from a new, 2019, iMac 27 with the following configuration? 3.6 GHz Core i9 pro…

Murray, The best way to compare machines is here- geekbenchmarks The multiple cores will not help much unless you use the parallel code. In default, Mathematica uses two cores. Regards Neil

If you are referring to the brand new 2019 iMac, I would not be surprised if it were slower! I read that this machine is equipped with an old fashioned HDD of Fusion Drive. And not with a SSD. This will slow down everything badly. Beware that the new Mathematica Version 12 will be over 10 GB on d…

I would assume that my going from 32 GB RAM to 64 GB would help there.

No benchmarks at geekbenchmarks yet for the 2019 iMacs, of course, since they have not quite yet been released to market.

The 2019 iMac I’m considering, like the late 2015 iMac I’m using now, has a 3 TB Fusion drive, which includes 128 GB flash storage. There is an option for SSD only, but the max size Apple will offer, pathetically, is 2 TB for that.

The RAM increase in size won’t do much for speed, unless you ended up using virtual RAM from your HD in the old computer because of too little RAM, then RAM size will make a great difference. RAM speed is what you should look at. Your new computer will probably have a great increase in that!

Murray, If you go to apple’s website they give the speed up for the new iMac’s in Mathematica. They claim a 40% speedup for the 6 core 4K machine and a 50% speedup for the 8 core 5k machine with the following footnote: Testing conducted by Apple in February 2019 using preproduction 3.2GHz 6-core…

Neil Singer: I missed those benchmark comparisons on the long Apple iMac info page. This information is very useful to me, so thank you for pointing to it!

I missed those benchmark examinations on the long Apple iMac data page. This information is profitable to me, so thank you for demonstrating it!

Mathematica speedup from 2019 iMac over late 2015 iMac?

Questions

bmmmburns (Marvin Ray Burns A.G.S. (cum laude)) March 24, 2019, 7:36pm 3

Parallel code on a single multi-core computer in Mathematica is great and it is good on a cluster that is properly set up. See my progress with Mathematica since 2000 and parallel code since 2012 here .

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Mathematica speedup from 2019 iMac over late 2015 iMac?

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