Источник изображений: AnandTech

In the first full review, Intel Core i7-11700K disappointed with its performance


Resource AnandTech managed to acquire one of the Intel Core i7-11700K samples, which have already appeared in the German Mindfactory store. Intel has yet to officially unveil the new series of CPUs and, despite numerous rumors, is reluctant to share details about the new desktop processors. Nevertheless, the specialized publication managed to conduct a comprehensive analysis of one of the representatives of the new series of Rocket Lake-S processors.

Image source: AnandTech

Image source: AnandTech

The resource did not provide full details about the platform on which the Core i7-11700K was tested, since this information is partially under a nondisclosure agreement. Chief Editor AnandTech Ian Cutress, the author of the review, says that he only provided information in the text that was already known thanks to Intel itself, but added a few new details. Early rumors suggested that the manufacturer is still “polishing” the BIOS firmware for new processors, which is why it will be possible to officially publish full reviews on Rocket Lake only from March 30th. It is very likely that the final version of the microcode will be able to change the picture that was observed in the review. AnandTech

The full version of the review can be found on the website that published it. Here we will analyze only the most interesting information – the performance in games and the level of power consumption of the Core i7-11700K.

Processor gaming tests require the minimum resolution and minimum image quality settings. Thanks to this, the performance will not be limited by the video card and it will be possible to determine the smallest differences in the speed of one or another chip. The AnandTech test bench used a GeForce RTX 2080 Ti graphics accelerator. It is also important to point out that the Intel Core i7-11700K and AMD Ryzen 9 5800X models were tested with DDR4-3200 RAM, while the Core i7-10700K and Core i9-9900KS models were tested with DDR4-2933 and DDR4-2666 memory, respectively. These are the maximum rates of RAM frequency that are directly supported by the processor architecture itself.

In gaming tests, the Rocket Lake-S was completely disappointing, which is quite surprising given Intel’s promise of a 19% increase in IPC (instructions per clock) relative to Comet Lake. The results can be found in the gallery below.

AnandTechseems to have found a possible explanation for why Rocket Lake-S performed so poorly in games. Apparently, the Intel Core i7-11700K suffers from increased L3 cache latency – from 43 clocks for Comet Lake-S to 51 clocks for Rocket Lake. The source notes that this probably led to an increase in data transfer latency between cores to 28-30 ns compared to 18-24 ns for Comet Lake-S. Intel has not yet said why it decided to change the structure of the L3 cache memory, or it has already said, but AnandTech cannot violate the prohibition on nondisclosure of this information.

Intel Core i7-11700K latency

Intel Core i7-11700K latency

Another interesting feature is the peak power consumption of the Core i7-11700K. The nominal TDP of the processor is 125W, but when executing tasks using AVX2 instructions, the chip’s power consumption increased to 225W. Under normal conditions of use, the processor temperature was 60 degrees Celsius with a power consumption level of 130-155 watts.

A surprise was the 292W TDP when performing tasks using the AVX-512 instructions. As noted in the review, the processor at this moment automatically set the frequency for all cores at 4.6 GHz and warmed up at a peak of 104 degrees Celsius.

In the review, we used a productive Noctua air cooler, designed for a similar TDP level.

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