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New 27-Inch iMac Has Up to 80% Faster Graphics at Compute Tasks Compared to Previous Model

Earlier this month, Apple launched new iMac models (https://www.macrumors.com/2017/06/05/apple-refreshes-21-5-inch-and-27-inch-imacs-with-best-mac-displays-ever-and-improved-performance/) with Intel's seventh-generation Kaby Lake processors and improved AMD Radeon Pro discrete graphics options at its annual Worldwide Developers Conference.





<img src="(http://cdn.macrumors.com/article-new/2013/09/27inch5kimac.jpg)" alt="" width="545" height="453" class="aligncenter size-full wp-image-570618" />


Early benchmark results for the new 27-inch iMac have already surfaced on Geekbench (http://www.geekbench.com/blog/2017/06/imac-27-inch-performance-june-2017/) that suggest the 2017 models are up to 15% faster in multi-core CPU performance compared to last-generation models.





Apple's new high-end 27-inch iMac stock configuration with a 3.8GHz quad-core Core i5 processor has an average multi-core score of 14,886, for example, compared to 12,953 for the equivalent 2015 model.





<img src="(http://cdn.macrumors.com/article-new/2017/06/27-inch-imac-multi-core-geekbench.jpg)" alt="" width="800" height="900" class="aligncenter size-full wp-image-572385" />


John Poole of Primate Labs, the creators of Geekbench, said the new 27-inch iMac also has up to 80% improved graphics performance compared to the equivalent 2015 models at compute tasks such as image processing.





Geekbench's new GPU Compute Benchmark (http://geekbench.com/doc/geekbench4-compute-workloads.pdf) measures the performance of GPUs at performing compute tasks such as image processing, computer vision, and physics simulations, rather than rendering tasks.





<img src="(http://cdn.macrumors.com/article-new/2017/06/imac-27-inch-gpu-geekbench.jpg)" alt="" width="800" height="845" class="aligncenter size-full wp-image-572396" />


Poole said compute performance is becoming more important as more applications, such as Photoshop, take advantage of GPU compute.





The built-to-order 27-inch iMac with a 4.2GHz quad-core Core i7 processor is Apple's fastest Mac ever in single-core CPU performance, according to the Geekbench results, continuing a trend set with the late 2014 model. The 2013 Mac Pro remains Apple's fastest Mac in multi-core CPU performance on Geekbench.





That will undoubtedly change in December when Apple launches the iMac Pro (https://www.macrumors.com/roundup/imac-pro/) with workstation-class tech specs, including up to an 18-core Intel Xeon processor, top-of-the-line Radeon Pro Vega graphics, up to 4TB of SSD storage, and up to 128GB of ECC RAM. iMac Pro will start at $4,999 in the United States.





The new 27-inch iMac starts at $1,799 (https://www.apple.com/shop/buy-mac/imac/27-inch). New 21.5-inch models are also available from $1,099 (https://www.apple.com/shop/buy-mac/imac/21.5-inch). Prices vary by country.

<div class="linkback">Related Roundup: iMac (https://www.macrumors.com/roundup/imac/)
Tags: Geekbench (https://www.macrumors.com/roundup/geekbench/), benchmarks (https://www.macrumors.com/roundup/benchmarks/)
Buyer's Guide: iMac (Buy Now) (https://buyersguide.macrumors.com/#iMac) </div>
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Source: New 27-Inch iMac Has Up to 80% Faster Graphics at Compute Tasks Compared to Previous Model (https://www.macrumors.com/2017/06/21/2017-27-inch-imac-benchmarks/)