Ryzen 9 7940HS vs Ryzen 9 3900X

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Aggregate performance score

Ryzen 9 3900X
2019
12 cores / 24 threads, 105 Watt
20.53
+7.5%
Ryzen 9 7940HS
2023
8 cores / 16 threads, 35 Watt
19.09

Ryzen 9 3900X outperforms Ryzen 9 7940HS by a small 8% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 3900X and Ryzen 9 7940HS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking275309
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation21.73no data
Market segmentDesktop processorLaptop
SeriesAMD Ryzen 9no data
Power efficiency15.5451.62
Architecture codenameMatisse (Zen 2) (2019−2020)Phoenix-HS (Zen 4) (2023)
Release date7 July 2019 (5 years ago)January 2023 (1 year ago)
Launch price (MSRP)$499no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 9 3900X and Ryzen 9 7940HS 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 cores12 (Dodeca-Core)8 (Octa-Core)
Threads2416
Base clock speed3.8 GHz4 GHz
Boost clock speed4.6 GHz5.2 GHz
L1 cache768 KB64K (per core)
L2 cache6 MB1 MB (per core)
L3 cache64 MB16 MB (shared)
Chip lithography7 nm, 12 nm4 nm
Die sizeno data178 mm2
Maximum core temperature95 °C100 °C
Number of transistors19,200 million25,000 million
64 bit support++
Windows 11 compatibility++
Unlocked multiplier+-

Compatibility

Information on Ryzen 9 3900X and Ryzen 9 7940HS 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
SocketAM4FP8
Power consumption (TDP)105 Watt35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900X and Ryzen 9 7940HS. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataRyzen 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, SME
AES-NI++
FMA-+
AVX++
Precision Boost 2++

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3900X and Ryzen 9 7940HS are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900X and Ryzen 9 7940HS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Dual-channelDDR5
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth51.196 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card-AMD Radeon 780M ( - 2800 MHz)

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3900X and Ryzen 9 7940HS.

PCIe versionno data4.0
PCI Express lanesno data20

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 3900X 20.53
+7.5%
Ryzen 9 7940HS 19.09

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 3900X 32613
+7.5%
Ryzen 9 7940HS 30331

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 3900X 1710
Ryzen 9 7940HS 2460
+43.9%

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 3900X 9939
Ryzen 9 7940HS 11573
+16.4%

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 3900X 6019
Ryzen 9 7940HS 7837
+30.2%

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 3900X 45539
Ryzen 9 7940HS 48751
+7.1%

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 3900X 14889
Ryzen 9 7940HS 15689
+5.4%

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 3900X 2.69
+0.4%
Ryzen 9 7940HS 2.7

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 3900X 34
+11.1%
Ryzen 9 7940HS 30

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 3900X 3049
+14.6%
Ryzen 9 7940HS 2661

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 3900X 207
Ryzen 9 7940HS 284
+37%

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 3900X 2.36
Ryzen 9 7940HS 3.38
+43.2%

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 9 3900X 10.8
Ryzen 9 7940HS 15.1
+40.5%

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 3900X 7534
+0.6%
Ryzen 9 7940HS 7490

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 3900X 147
+2%
Ryzen 9 7940HS 144

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 3900X 268
Ryzen 9 7940HS 293
+9.3%

Geekbench 5.5 Multi-Core

Ryzen 9 3900X 10498
Ryzen 9 7940HS 12111
+15.4%

Blender(-)

Ryzen 9 3900X 162
Ryzen 9 7940HS 189
+16.5%

Geekbench 5.5 Single-Core

Ryzen 9 3900X 1250
Ryzen 9 7940HS 1986
+58.9%

7-Zip Single

Ryzen 9 3900X 5316
Ryzen 9 7940HS 6652
+25.1%

7-Zip

Ryzen 9 3900X 80935
+13.9%
Ryzen 9 7940HS 71086

WebXPRT 3

Ryzen 9 3900X 225
Ryzen 9 7940HS 317
+40.9%

Gaming performance

Pros & cons summary


Performance score 20.53 19.09
Physical cores 12 8
Threads 24 16
Chip lithography 7 nm 4 nm
Power consumption (TDP) 105 Watt 35 Watt

Ryzen 9 3900X has a 7.5% higher aggregate performance score, and 50% more physical cores and 50% more threads.

Ryzen 9 7940HS, on the other hand, has a 75% more advanced lithography process, and 200% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Ryzen 9 3900X and Ryzen 9 7940HS.

Note that Ryzen 9 3900X is a desktop processor while Ryzen 9 7940HS is a notebook one.


Should you still have questions on choice between Ryzen 9 3900X and Ryzen 9 7940HS, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 3900X
Ryzen 9 3900X
AMD Ryzen 9 7940HS
Ryzen 9 7940HS

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Community ratings

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