Benchmarks of unreleased iMac with 10th-Gen Intel Comet Lake S chip surface online on Geekbench

Benchmarks of an unreleased iMac with 10th-gen Core i9 Intel Comet Lake-S chip (Core i9 10910) and AMD Radeon Pro 5300 graphics card have surfaced on Geekbench. These new benchmarks give users an idea of what can be expected from the 2020 iMac.

Intel’s 10th-gen Comet Lake-S processors were released to the mainstream market back in April but Intel is known to manufacture custom Lake-S chips for bigger clients. Apple’s upcoming iMac with Intel Core i9-10910 will likely feature a custom-tailored chip from Intel.

These new benchmarks were first seen on Twitter after being spotted by @_rogame. The CPU features the same base specs as its other variants in the market, with its processor supporting 10 CPU Cores, 20 MB of L3 cache, and 20 threads. However, the listed clock speed in the benchmark make a viable difference.

According to the submission on Geekbench, Core i9-10910 runs with a 3.6Ghz base clock and 4.7Ghz boost clock, which is a 28% boost forward from iMac’s Core i9-10900.

Tom’s Hardware analyzed the position of the Core i9-10910 among its other variants as:

“Given the shared specifications, the Core i9-10910 should slot right in between the Core i9-10900K and Core i9-10910. The first is a 125W part, while the latter is a 65W chip. This means that the Core i9-10910 is likely a 95W processor.”

AMD Radeon Pro 5300 for iMac

The unannounced AMD Radeon Pro 5300 graphics card was also featured in the leaked benchmarks for the new iMac. It is a desktop variant of the Radeon Pro 5300M, announced last year by AMD. According to reports, the Radeon Pro 5300 will be based on Navi 14 silicon with 1280 SPs (Stream Processors).


Geekbench reports Radeon Pro 5300’s maximum clock speed as 1650 MHz with 4GB VRAM onboard. The benchmarks did not specify memory specs for Radeon Pro 5300. However, Radeon Pro 5300M debuted with 12Gbps memory and the same can be expected from Radeon Pro 5300 that will ship with the upcoming iMac.

The company shared plans to start transitioning Intel-based Macs to its own Apple Silicon starting Q3 2020. It might be possible that this would be the last major Intel iMac release before we see an ARM-processor based iMac. No details about the upcoming iMac’s design have been shared yet but it is highly possible that Apple will improve upon its old 27-inch iMac design from 2012.

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