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AnandTech Reviews Intel's i7-11700K "Rocket Lake" CPU Early

Accepted submission by takyon at 2021-03-06 16:02:21

Intel's next-generation "Rocket Lake" [] CPUs will be some of Intel's last desktop models on a "14nm" node, and include "backported" Willow Cove cores (referred to as "Cypress Cove") from "10nm" Tiger Lake mobile CPUs, with improved instructions per clock. Notably, the lineup only goes up to 8 cores, instead of 10 cores for the previous Core i9. The review embargo ends on the launch date, March 30th, but some retailers have been selling the CPUs early. AnandTech obtained an 8-core i7-11700K and wrote a review of it []. The results were not great.

Power consumption of the 125 W TDP chip peaked at 224.56 W when running an AVX2 workload, compared to 204.79 W for its i7-10700K "Comet Lake" [] predecessor and 141.45 W for AMD's Ryzen 7 5800X. The i7-11700K reached 291.68 W with an AVX-512 workload.

The i7-11700K not only failed to beat the 5800X in many benchmarks, but trailed the previous-gen i7-10700K in some cases. The major exception is performance in AVX-512 workloads. Gaming performance of the i7-11700K was particularly bad, in part due to an increase in L3 cache and core-to-core latency.

It's possible that there will be some improvements from a final microcode update before launch []. There's also models like the Core i9-11900K [], which have the same 8 cores but can clock up to 300 MHz higher.

See also: Intel Core i7-11700K 8 Core Rocket Lake CPU Review Published By Anandtech – Very Hot, Consumes More Power Than Core i9-10900K & Slower Than AMD In Core-To-Core Tests []

Related: Linus Torvalds: Don't Hide Rust in Linux Kernel; Death to AVX-512 []
Former Intel Principal Engineer Blasts the Company []
Gigabyte Confirms Intel Rocket Lake Desktop CPUs Will Launch in March []

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