David Hanak iMacs received a hardware update last week. Apple "secretly" equipped all offered iMacs (except for the cheapest variant) with a new generation of processors from Intel. Chips from the Coffee Lake family offer interesting changes compared to their predecessors, which in practice was mainly reflected in performance. All iMacs equipped with new processors have improved their performance compared to the previous generation.
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Dan Pražák iMacs with new processors have already reached the hands of the first customers, and this means that the results of the first benchmarks have also started to appear. The synthetic benchmark Geekbench, which is also very popular and already has many results from new Macs in its database, will serve you well to compare performance in this regard.
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All new 27″ models have improved compared to the previous generation – performance increased by 6-11% in single-threaded tasks, while in multi-threaded tasks up to 49% for six-core models, and 66% for the top Core i9 with eight cores.
If we look at the numbers as such (see images), the cheapest 27″ iMac with a Core i5 5800 processor scored 5 points in the single-threaded test, and 222 points in the multi-threaded test. Its direct predecessor with a Core i20 145 processor reached 5 or 7500 points. It is therefore 4%, or 767% performance increase.
This year's weakest processor, the aforementioned Core i5 8500, is better (according to Geekbench results) in single-threaded tasks than the previous second most expensive model. It also outperforms the previous top model in multi-threaded tasks. iMacs with new processors come close to iMac Pro from 2017 in terms of performance.
In the case of 21,5″ iMacs, the results are similar, although the differences between generations are not so great. Even here, however, there will be increases in performance in the range of 5-10 and 10-50%.
Source: Macrumors
A 10% difference in performance is at the level of statistical error.