i7-6900K vs i7-7820X

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Aggregate performance score

Core i7-7820X
2017
8 cores / 16 threads, 140 Watt
10.80
+18.6%
Core i7-6900K
2016
8 cores / 16 threads, 140 Watt
9.11

Core i7-7820X outperforms Core i7-6900K by a moderate 19% based on our aggregate benchmark results.

Primary details

Comparing Core i7-7820X and Core i7-6900K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking724842
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.441.04
Market segmentDesktop processorDesktop processor
SeriesIntel Core i7no data
Power efficiency7.306.15
Architecture codenameSkylake (server) (2017−2018)Broadwell-E (2016)
Release date26 June 2017 (7 years ago)31 May 2016 (8 years ago)
Launch price (MSRP)$599$1,020

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-7820X has 231% better value for money than i7-6900K.

Detailed specifications

Core i7-7820X and Core i7-6900K basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores8 (Octa-Core)8 (Octa-Core)
Threads1616
Base clock speed3.6 GHz3.2 GHz
Boost clock speed4.5 GHz4 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier36no data
L1 cache64 KB (per core)32 KB (per core)
L2 cache1 MB (per core)256 KB (per core)
L3 cache11 MB (shared)20 MB (shared)
Chip lithography14 nm14 nm
Maximum core temperature99 °Cno data
Maximum case temperature (TCase)72 °C72 °C
64 bit support++
Windows 11 compatibility+-
Unlocked multiplier++

Compatibility

Information on Core i7-7820X and Core i7-6900K compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration1 (Uniprocessor)1
SocketFCLGA2066FCLGA2011
Power consumption (TDP)140 Watt140 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-7820X and Core i7-6900K. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512no data
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.02.0
Hyper-Threading Technology++
TSX+-
Idle Statesno data+
Smart Responseno data+
Turbo Boost Max 3.0++

Security technologies

Core i7-7820X and Core i7-6900K technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-7820X and Core i7-6900K are enumerated here.

VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-7820X and Core i7-6900K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-2666DDR4
Maximum memory size128 GB128 GB
Max memory channels44
Maximum memory bandwidth85.33 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardN/Ano data

Peripherals

Specifications and connection of peripherals supported by Core i7-7820X and Core i7-6900K.

PCIe version3.03.0
PCI Express lanes2840

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i7-7820X 10.80
+18.6%
i7-6900K 9.11

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-7820X 17163
+18.6%
i7-6900K 14470

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-7820X 1426
+11%
i7-6900K 1285

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-7820X 7862
+9.3%
i7-6900K 7196

Gaming performance

Pros & cons summary


Performance score 10.80 9.11
Recency 26 June 2017 31 May 2016

i7-7820X has a 18.6% higher aggregate performance score, and an age advantage of 1 year.

The Core i7-7820X is our recommended choice as it beats the Core i7-6900K in performance tests.


Should you still have questions on choice between Core i7-7820X and Core i7-6900K, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core i7-7820X
Core i7-7820X
Intel Core i7-6900K
Core i7-6900K

Similar processor comparisons

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

Here you can ask a question about Core i7-7820X or Core i7-6900K, agree or disagree with our judgements, or report an error or mismatch.