Ryzen 9 7900 vs i7-6700K

Aggregate performance score

Core i7-6700K
2015
4 cores / 8 threads, 91 Watt
5.62
Ryzen 9 7900
2023
12 cores / 24 threads, 65 Watt
30.74
+447%

Ryzen 9 7900 outperforms Core i7-6700K by a whopping 447% based on our aggregate benchmark results.

Primary details

Comparing Core i7-6700K and Ryzen 9 7900 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1137133
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.0662.24
Market segmentDesktop processorDesktop processor
SeriesIntel Core i7 (Desktop)no data
Power efficiency5.8444.76
Architecture codenameSkylake (2015−2016)Raphael (Zen4) (2022−2023)
Release date5 August 2015 (9 years ago)14 January 2023 (1 year ago)
Launch price (MSRP)$339$429

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 7900 has 5772% better value for money than i7-6700K.

Detailed specifications

Core i7-6700K and Ryzen 9 7900 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 cores4 (Quad-Core)12 (Dodeca-Core)
Threads824
Base clock speed4 GHz3.7 GHz
Boost clock speed4.2 GHz5.4 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier40no data
L1 cache64 KB (per core)64K (per core)
L2 cache256 KB (per core)1 MB (per core)
L3 cache8 MB (shared)64 MB (shared)
Chip lithography14 nm5 nm
Die size122 mm22x 71 mm2
Maximum core temperatureno data95 °C
Maximum case temperature (TCase)64 °C47 °C
Number of transistors1750 Million13,140 million
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier++

Compatibility

Information on Core i7-6700K and Ryzen 9 7900 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
SocketFCLGA1151AM5
Power consumption (TDP)91 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-6700K and Ryzen 9 7900. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX25 nm, 0.650 - 1.475V
AES-NI++
AVX++
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology+no data
TSX+-
Idle States+no data
Thermal Monitoring+-
Precision Boost 2no data+

Security technologies

Core i7-6700K and Ryzen 9 7900 technologies aimed at improving security, for example, by protecting against hacks.

TXT-no data
EDB+no data
Secure Key+no data
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-6700K and Ryzen 9 7900 are enumerated here.

AMD-V++
VT-d+no data
VT-x+no data
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-6700K and Ryzen 9 7900. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR5-5200
Maximum memory size64 GBno data
Max memory channels2no data
Maximum memory bandwidth34.134 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel HD Graphics 530AMD Radeon Graphics (Ryzen 7000)
Max video memory64 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.15 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i7-6700K and Ryzen 9 7900 integrated GPUs.

Number of displays supported3no data
eDP+no data
DisplayPort+-
HDMI+-
DVI+no data

Graphics image quality

Maximum display resolutions supported by Core i7-6700K and Ryzen 9 7900 integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hzno data
Max resolution over eDP4096x2304@60Hzno data
Max resolution over DisplayPort4096x2304@60Hzno data
Max resolution over VGAN/Ano data

Graphics API support

APIs supported by Core i7-6700K and Ryzen 9 7900 integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i7-6700K and Ryzen 9 7900.

PCIe version3.05.0
PCI Express lanes1624

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.

i7-6700K 5.62
Ryzen 9 7900 30.74
+447%

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.

i7-6700K 8933
Ryzen 9 7900 48832
+447%

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.

i7-6700K 1506
Ryzen 9 7900 2857
+89.7%

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.

i7-6700K 4939
Ryzen 9 7900 16834
+241%

Cinebench 10 32-bit single-core

Cinebench R10 is an ancient ray tracing benchmark for processors by Maxon, authors of Cinema 4D. Its single core version uses just one CPU thread to render a futuristic looking motorcycle.

i7-6700K 6531
Ryzen 9 7900 8339
+27.7%

Cinebench 10 32-bit multi-core

Cinebench Release 10 Multi Core is a variant of Cinebench R10 using all the processor threads. Possible number of threads is limited by 16 in this version.

i7-6700K 25817
Ryzen 9 7900 60934
+136%

3DMark06 CPU

3DMark06 is a discontinued DirectX 9 benchmark suite from Futuremark. Its CPU part contains two scenarios, one dedicated to artificial intelligence pathfinding, another to game physics using PhysX package.

i7-6700K 9037
Ryzen 9 7900 19451
+115%

wPrime 32

wPrime 32M is a math multi-thread processor test, which calculates square roots of first 32 million integer numbers. Its result is measured in seconds, so that the less is benchmark result, the faster the processor.

i7-6700K 6.66
Ryzen 9 7900 2.98
+123%

Cinebench 11.5 64-bit multi-core

Cinebench Release 11.5 Multi Core is a variant of Cinebench R11.5 which uses all the processor threads. A maximum of 64 threads is supported in this version.

i7-6700K 10
Ryzen 9 7900 45
+370%

Cinebench 15 64-bit multi-core

Cinebench Release 15 Multi Core is a variant of Cinebench R15 which uses all the processor threads.

i7-6700K 880
Ryzen 9 7900 4020
+357%

Cinebench 15 64-bit single-core

Cinebench R15 (standing for Release 15) is a benchmark made by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version (sometimes called Single-Thread) only uses a single processor thread to render a room full of reflective spheres and light sources.

i7-6700K 178
Ryzen 9 7900 315
+77.5%

Cinebench 11.5 64-bit single-core

Cinebench R11.5 is an old benchmark by Maxon, authors of Cinema 4D. It was superseded by later versions of Cinebench, which use more modern variants of Cinema 4D engine. The Single Core version loads a single thread with ray tracing to render a glossy room full of crystal spheres and light sources.

i7-6700K 1.97
Ryzen 9 7900 3.68
+86.8%

TrueCrypt AES

TrueCrypt is a discontinued piece of software that was widely used for on-the-fly-encryption of disk partitions, now superseded by VeraCrypt. It contains several embedded performance tests, one of them being TrueCrypt AES, which measures data encryption speed using AES algorithm. Result is encryption speed in gigabytes per second.

i7-6700K 4.4
Ryzen 9 7900 21.5
+394%

x264 encoding pass 2

x264 Pass 2 is a slower variant of x264 video compression that produces a variable bit rate output file, which results in better quality since the higher bit rate is used when it is needed more. Benchmark result is still measured in frames per second.  

i7-6700K 55
Ryzen 9 7900 207
+279%

x264 encoding pass 1

x264 version 4.0 is a video encoding benchmark uses MPEG 4 x264 compression method to compress a sample HD (720p) video. Pass 1 is a faster variant that produces a constant bit rate output file. Its result is measured in frames per second, which means how many frames of the source video file were encoded per second.  

i7-6700K 205
Ryzen 9 7900 356
+73.6%

WinRAR 4.0

WinRAR 4.0 is an outdated version of a popular file archiver. It contains an internal speed test, using 'Best' setting of RAR compression on large chunks of randomly generated data. Its results are measured in kilobytes per second.

i7-6700K 5877
Ryzen 9 7900 10154
+72.8%

Gaming performance

Pros & cons summary


Performance score 5.62 30.74
Integrated graphics card 2.60 4.42
Recency 5 August 2015 14 January 2023
Physical cores 4 12
Threads 8 24
Chip lithography 14 nm 5 nm
Power consumption (TDP) 91 Watt 65 Watt

Ryzen 9 7900 has a 447% higher aggregate performance score, 70% faster integrated GPU, an age advantage of 7 years, 200% more physical cores and 200% more threads, a 180% more advanced lithography process, and 40% lower power consumption.

The Ryzen 9 7900 is our recommended choice as it beats the Core i7-6700K in performance tests.


Should you still have questions on choice between Core i7-6700K and Ryzen 9 7900, 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 i7-6700K
Core i7-6700K
AMD Ryzen 9 7900
Ryzen 9 7900

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Community ratings

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