Ryzen 7 7840U vs Ryzen 9 7940HS

VS

Aggregate performance score

Ryzen 9 7940HS
2023
8 cores / 16 threads, 35 Watt
19.09
+21.5%
Ryzen 7 7840U
2023
8 cores / 16 threads, 28 Watt
15.71

Ryzen 9 7940HS outperforms Ryzen 7 7840U by a significant 22% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 7940HS and Ryzen 7 7840U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking309435
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
Seriesno dataAMD Phoenix (Zen 4, Ryzen 7040)
Power efficiency51.6253.10
Architecture codenamePhoenix-HS (Zen 4) (2023)Phoenix-U (Zen 4) (2023)
Release dateJanuary 2023 (1 year ago)May 2023 (1 year ago)

Detailed specifications

Ryzen 9 7940HS and Ryzen 7 7840U 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 speed4 GHz3.3 GHz
Boost clock speed5.2 GHz5.1 GHz
L1 cache64K (per core)64K (per core)
L2 cache1 MB (per core)1 MB (per core)
L3 cache16 MB (shared)16 MB (shared)
Chip lithography4 nm4 nm
Die size178 mm2178 mm2
Maximum core temperature100 °C100 °C
Number of transistors25,000 million25,000 million
64 bit support++
Windows 11 compatibility++

Compatibility

Information on Ryzen 9 7940HS and Ryzen 7 7840U 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 configuration11
SocketFP8FP8
Power consumption (TDP)35 Watt28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 7940HS and Ryzen 7 7840U. 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, SMEno data
AES-NI++
FMA+-
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 7940HS and Ryzen 7 7840U are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 7940HS and Ryzen 7 7840U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR5DDR5-5600

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardAMD Radeon 780M ( - 2800 MHz)AMD Radeon 780M ( - 2700 MHz)

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 7940HS and Ryzen 7 7840U.

PCIe version4.04.0
PCI Express lanes2020

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 9 7940HS 19.09
+21.5%
Ryzen 7 7840U 15.71

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 9 7940HS 30331
+21.5%
Ryzen 7 7840U 24956

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.

Ryzen 9 7940HS 2460
+18.2%
Ryzen 7 7840U 2081

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.

Ryzen 9 7940HS 11573
+32.4%
Ryzen 7 7840U 8744

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 9 7940HS 7837
+17.5%
Ryzen 7 7840U 6669

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 9 7940HS 48751
+26.7%
Ryzen 7 7840U 38490

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 9 7940HS 15689
+25.7%
Ryzen 7 7840U 12482

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 9 7940HS 2.7
+30%
Ryzen 7 7840U 3.51

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 9 7940HS 30
+34.7%
Ryzen 7 7840U 23

Cinebench 15 64-bit multi-core

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

Ryzen 9 7940HS 2661
+33.7%
Ryzen 7 7840U 1990

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 9 7940HS 284
+7.4%
Ryzen 7 7840U 264

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 9 7940HS 3.38
+21.1%
Ryzen 7 7840U 2.79

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 9 7940HS 15.1
+78.7%
Ryzen 7 7840U 8.5

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 9 7940HS 7490
+30.9%
Ryzen 7 7840U 5723

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.  

Ryzen 9 7940HS 144
+32.5%
Ryzen 7 7840U 109

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.  

Ryzen 9 7940HS 293
+23.3%
Ryzen 7 7840U 237

Geekbench 5.5 Multi-Core

Ryzen 9 7940HS 12111
+29.1%
Ryzen 7 7840U 9382

Blender(-)

Ryzen 9 7940HS 189
Ryzen 7 7840U 260
+37.3%

Geekbench 5.5 Single-Core

Ryzen 9 7940HS 1986
+14.3%
Ryzen 7 7840U 1738

7-Zip Single

Ryzen 9 7940HS 6652
+11.8%
Ryzen 7 7840U 5952

7-Zip

Ryzen 9 7940HS 71086
+28.9%
Ryzen 7 7840U 55145

WebXPRT 3

Ryzen 9 7940HS 317
+21%
Ryzen 7 7840U 262

CrossMark Overall

Ryzen 9 7940HS 1797
+17.2%
Ryzen 7 7840U 1534

WebXPRT 4 Overall

Ryzen 9 7940HS 263
+26.4%
Ryzen 7 7840U 208

Blender v3.3 Classroom CPU(-)

Ryzen 9 7940HS 308
Ryzen 7 7840U 421
+36.7%

Geekbench 6.3 Multi-Core

Ryzen 9 7940HS 12348
+16.7%
Ryzen 7 7840U 10584

Geekbench 6.3 Single-Core

Ryzen 9 7940HS 2662
+11.2%
Ryzen 7 7840U 2394

Gaming performance

Pros & cons summary


Performance score 19.09 15.71
Power consumption (TDP) 35 Watt 28 Watt

Ryzen 9 7940HS has a 21.5% higher aggregate performance score.

Ryzen 7 7840U, on the other hand, has 25% lower power consumption.

The Ryzen 9 7940HS is our recommended choice as it beats the Ryzen 7 7840U in performance tests.


Should you still have questions on choice between Ryzen 9 7940HS and Ryzen 7 7840U, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 7940HS
Ryzen 9 7940HS
AMD Ryzen 7 7840U
Ryzen 7 7840U

Similar processor comparisons

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Community ratings

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