Does a hexa-core U-series processor under a 15 W power envelope make sense? As anticipated, Turbo Boost performance is excellent during the first few minutes before clock rates inevitably fall over time. The dip in performance comes out to be about 15 to 25 percent on the Dell XPS 13 7390 Core i7-10710U unit.

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Back in August, we previewed a pre-production Core i7-10510U Comet Lake-U laptop courtesy of Schenker Technologies. Raw performance was somewhat disappointing at just a few percentage points over the Core i7-8565U at best even after tweaking its TDP levels to squeeze out as much as we could. Now that it's November, we can finally find proper Core i7-10710U laptops on store shelves with finalized drivers designed for consumers.

Our benchmarks below were performed on a retail Dell XPS 13 7390 which happens to be one of the first laptops to ship with the hexa-core Core i7-10710U. Unlike our early Schenker unit, these results should be a better representation of what consumers will see. Raw multi-thread performance is about 50 percent and 30 percent faster than the quad-core Core i7-8565U and more demanding 35 W Ryzen 7 3750H, respectively, according to CineBench R20. The deltas are generally smaller in other benchmarks like wPrime and HWBOT, but the advantage is still there in favor of the Comet Lake-U CPU. If you intend to run applications that can exploit 6 physical cores, then the hexa-core Core i7-10710U will benefit you the most.

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