i7-8700K vs Ryzen 7 7840S

VS

Aggregate performance score

Ryzen 7 7840S
2023
8 cores / 16 threads, 35 Watt
15.09
+76.1%
Core i7-8700K
2017
6 cores / 12 threads, 95 Watt
8.57

Ryzen 7 7840S outperforms Core i7-8700K by an impressive 76% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 7 7840S and Core i7-8700K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking467887
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data4.55
Market segmentLaptopDesktop processor
SeriesPhoenix (Zen 4, Ryzen 7040)Intel Core i7
Power efficiency40.788.53
Architecture codenamePhoenix-HS (Zen 4) (2023)Coffee Lake-S (2017−2018)
Release date5 January 2023 (1 year ago)5 October 2017 (7 years ago)
Launch price (MSRP)no data$359

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 7 7840S and Core i7-8700K 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)6 (Hexa-Core)
Threads1612
Base clock speed3.8 GHz3.7 GHz
Boost clock speed5.1 GHz4.7 GHz
Bus typeno dataDMI 3.0
Bus rateno data4 × 8 GT/s
Multiplierno data37
L1 cache512 KB64K (per core)
L2 cache8 MB256K (per core)
L3 cache16 MB12288 KB
Chip lithography4 nm14 nm
Die size178 mm2149 mm2
Maximum core temperature100 °C100 °C
Maximum case temperature (TCase)no data72 °C
64 bit support++
Windows 11 compatibility++
Unlocked multiplier-+

Compatibility

Information on Ryzen 7 7840S and Core i7-8700K 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 configurationno data1 (Uniprocessor)
SocketFP7/FP7r2/FP8FCLGA1151
Power consumption (TDP)35 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 7840S and Core i7-8700K. You'll probably need this information if you require some particular technology.

Instruction set extensionsRyzen AI, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SMEIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI++
FMA+-
AVX++
vProno data+
Enhanced SpeedStep (EIST)no data+
Turbo Boost Technologyno data2.0
Hyper-Threading Technologyno data+
TSX-+
Idle Statesno data+
Thermal Monitoring-+
SIPP-+

Security technologies

Ryzen 7 7840S and Core i7-8700K technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDBno data+
Secure Keyno data+
MPX-+
Identity Protection-+
SGXno dataYes with Intel® ME
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 7840S and Core i7-8700K are enumerated here.

AMD-V-+
VT-dno data+
VT-xno data+
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 7840S and Core i7-8700K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR5DDR3, DDR4
Maximum memory sizeno data128 GB
Max memory channelsno data2
Maximum memory bandwidthno data42.671 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
AMD Radeon 780M ( - 2700 MHz)Intel UHD Graphics 630
Max video memoryno data64 GB
Quick Sync Video-+
Clear Videono data+
Clear Video HDno data+
Graphics max frequencyno data1.2 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Ryzen 7 7840S and Core i7-8700K integrated GPUs.

Number of displays supportedno data3

Graphics image quality

Maximum display resolutions supported by Ryzen 7 7840S and Core i7-8700K integrated GPUs, including resolutions over different interfaces.

4K resolution supportno data+
Max resolution over HDMI 1.4no data4096 x 2304@24Hz
Max resolution over eDPno data4096 x 2304@60Hz
Max resolution over DisplayPortno data4096 x 2304@60Hz

Graphics API support

APIs supported by Ryzen 7 7840S and Core i7-8700K integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Ryzen 7 7840S and Core i7-8700K.

PCIe versionno data3.0
PCI Express lanesno data16

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.

Ryzen 7 7840S 15.09
+76.1%
i7-8700K 8.57

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.

Ryzen 7 7840S 23966
+76%
i7-8700K 13619

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.

Ryzen 7 7840S 7579
+3.4%
i7-8700K 7328

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.

Ryzen 7 7840S 45931
+17.5%
i7-8700K 39096

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.

Ryzen 7 7840S 14547
+24.3%
i7-8700K 11701

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.

Ryzen 7 7840S 10.2
i7-8700K 4.16
+145%

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.

Ryzen 7 7840S 29
+90.7%
i7-8700K 15

Cinebench 15 64-bit multi-core

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

Ryzen 7 7840S 2223
+63.2%
i7-8700K 1362

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.

Ryzen 7 7840S 274
+42.7%
i7-8700K 192

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.

Ryzen 7 7840S 3.33
+51.4%
i7-8700K 2.2

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.

Ryzen 7 7840S 12.9
+61.3%
i7-8700K 8

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.

Ryzen 7 7840S 20369
+186%
i7-8700K 7120

Geekbench 5.5 Multi-Core

Ryzen 7 7840S 11288
+78.9%
i7-8700K 6310

Blender(-)

Ryzen 7 7840S 213
i7-8700K 333
+56.2%

Geekbench 5.5 Single-Core

Ryzen 7 7840S 1939
+60.2%
i7-8700K 1210

Gaming performance

Pros & cons summary


Performance score 15.09 8.57
Integrated graphics card 18.32 3.09
Recency 5 January 2023 5 October 2017
Physical cores 8 6
Threads 16 12
Chip lithography 4 nm 14 nm
Power consumption (TDP) 35 Watt 95 Watt

Ryzen 7 7840S has a 76.1% higher aggregate performance score, 492.9% faster integrated GPU, an age advantage of 5 years, 33.3% more physical cores and 33.3% more threads, a 250% more advanced lithography process, and 171.4% lower power consumption.

The Ryzen 7 7840S is our recommended choice as it beats the Core i7-8700K in performance tests.

Be aware that Ryzen 7 7840S is a notebook processor while Core i7-8700K is a desktop one.


Should you still have questions on choice between Ryzen 7 7840S and Core i7-8700K, ask them in Comments section, and we shall answer.

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AMD Ryzen 7 7840S
Ryzen 7 7840S
Intel Core i7-8700K
Core i7-8700K

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Community ratings

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