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Intel Core i7-7740X X-Series Kaby Lake-X CPU Review (Page 1)

Intel Core i7-7740X X-Series Kaby Lake-X CPU Review

Intel's Core i7-7740X X-Series Kaby Lake-X CPU gets put under the spotlight as we completely run it through its paces to see how it does.

Steven Bassiri | Jul 5, 2017 at 3:11 pm CDT - 1 min, 27 secs time to read this page
Rating: 91%Manufacturer: Intel



There has been a lot of discussion about Intel's simultaneous launch of its Skylake-X and Kaby Lake-X CPUs on the X299 chipset. Much of it surrounds the purpose or use case of the i7-7740X and i5-7640X. The two CPUs offer the same PCI-E lane count and dual-channel memory controller as the 7700K and 7600K, and can't take advantage of the X299 platforms' quad channel memory support and expanded PCI-E lane options.

On the cost side, while the X-series CPUs cost the same as their K-series counterparts, X299 motherboards cost a lot more than Z170/Z270 motherboards, and they don't have integrated graphics.

The introduction of the Kaby Lake-X SKUs does do a few things for Intel and CPU owners. For starters, it lowers initial costs, as some people will buy these CPUs as placeholders for the 12+ core parts or future CPU purchases. It also delivers on Intel's promise of their most scalable platform ever. While the placeholder option is common for many people, the CPU does have a small secret; it overclocks incredibly high consistently.


Intel Core i7-7740X X-Series Kaby Lake-X CPU Review 02 |

The i7-7740X has a base frequency of 4.3Ghz with a Turbo of up to 4.5GHz, compared to 4.2GHz and 4.5GHz on the 7700K. It supports dual channel DDR4 running at 2666MHz (the 7700K is at 2400MHz) and offers Hyper-Threading technology, so you get eight threads. The CPU has a TDP of 112W (compared to 91W on the 7700K) and gets 8MB of L3 cache.


The Core i7-7740X is priced around $339, which is the same price as the 7700K. You will be paying a bit more for a motherboard than you would if you got a 7700K.

Last updated: Nov 15, 2019 at 01:16 pm CST

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Steven Bassiri

ABOUT THE AUTHOR - Steven Bassiri

Steven went from a fledgling forum reader in 2003 to one of the internet's brightest tech stars by 2010. Armed with an information systems degree, a deep understanding of circuitry, and a passion for tech, Steven (handle Sin0822) enjoys sharing his deep knowledge with others. Steven details products down to the component level to highlight seldom explained, and often misunderstood architectures. Steven is also a highly decorated overclocker with several world records.

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