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Intel i7-11700K vs Ryzen 7 5800X Review: Rocket Lake Falls Behind Zen 3 w/ Power Draw of Nearly 300W

It looks like Intel itself doesn’t have much confidence in the capabilities of its upcoming Rocket Lake-S lineup. AnandTech posted a review of the Core i7-11700K to a disappointed audience, and Intel had nothing to say about it, indicating that the performance likely won’t change by much after release.

Starting off with the rendering tests such as Blender, Corona, V-Ray, and Cinebench, you can see that the Ryzen 7 5800X comfortably beats the 11700K in every test except Blender where it’s just a few seconds slower.

Fortunately for the Core i7-11700K, it is a fair bit faster than its predecessor, the 10700K in each and every benchmark, with CB R20 ST seeing an uplift of around 12-13%. In the multi-threaded benchmarks, the former is 15-17% faster than the latter, which isn’t bad for an inter-generational gain, but nothing impressive either. Let’s have a look at the gaming benchmarks, and see if Intel manages to take its gaming crown back:

In gaming, the Core i7-11700K performs rather horrendously. It’s slower than the Ryzen 7 5800X across the board, and that too by a pretty wide margin. In fact, it even falls short of the 10700K, its predecessor, in most titles. It ekes out a win in Gears 5 by just a couple of frames. Nothing short of a disaster. Now, let’s see why this is:

As you can see, the core-to-core latency on the Core i7-11700K is pretty high. It’s higher than its predecessor, the Core i7-10700K, and even AMD’s Ryzen 7 5800X which is a first. Intel’s primary advantages in the past have been better inter-core communication which has allowed it to hold a lead in gaming workloads:

The 5950X has a maximum inter-core latency of 18-19ns with an average of 16-17ns, while the 11700K crosses the 30ns mark which is twice as much. It’ll be interesting to see if the upcoming microcode improves this:

The above graphs show the cache-to-memory bandwidth. Once again, the cache bandwidth deteriorates upon going from the 10700K to the 11700K. In fact, with a test depth of more than 32KB, the Ryzen 7 5800X is markedly better than both the 10700K as well as the 11700K, a much-needed step up from Zen 2.

Last but not the least, we have the temps and power draw. The Core i7-11700K is a power well both with and without AVX512. In AVX2 workloads, it pushes the 220W, roughly 20W higher than the 10700K and 83W more than the Ryzen 7 5800X. With AVX-515, it draws a whopping 292W. Maybe Linus was right and AVX-512 ought to die a painful death, at least in the consumer segment.

Courtesy: AnandTech

Areej

Computer Engineering dropout (3 years), writer, journalist, and amateur poet. I started my first technology blog, Techquila while in college to address my hardware passion. Although largely successful, it was a classic example of too many people trying out multiple different things but getting nothing done. Left in late 2019 and been working on Hardware Times ever since.

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