Ryzen 9 3900 vs Ryzen 9 7940HX

Aggregate performance score

Ryzen 9 7940HX
2024
16 cores / 32 threads, 55 Watt
34.92
+73.6%

Ryzen 9 7940HX outperforms Ryzen 9 3900 by an impressive 74% based on our aggregate benchmark results.

Primary details

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

Place in the ranking113289
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data20.34
Market segmentLaptopDesktop processor
SeriesAMD Dragon Range (Zen 4, Ryzen 7045)AMD Matisse (Ryzen 3000 Desktop)
Power efficiency57.8928.23
Architecture codenameDragon Range-HX (Zen 4) (2023−2024)Matisse (Zen 2) (2019−2020)
Release date17 January 2024 (less than a year ago)24 September 2019 (5 years ago)
Launch price (MSRP)no data$499

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 9 7940HX and Ryzen 9 3900 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 cores16 (Hexadeca-Core)12 (Dodeca-Core)
Threads3224
Base clock speed2.4 GHz3.1 GHz
Boost clock speed5.2 GHz4.3 GHz
L1 cache1 MB768 KB
L2 cache16 MB6 MB
L3 cache64 MB64 MB
Chip lithography5 nm7 nm, 12 nm
Die sizeno data2x 74 mm2
Maximum core temperature100 °Cno data
Number of transistors9900 Million7,600 million
64 bit support++
Windows 11 compatibilityno data-
Unlocked multiplier-+

Compatibility

Information on Ryzen 9 7940HX and Ryzen 9 3900 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
SocketFL1AM4
Power consumption (TDP)55 Watt65 Watt

Technologies and extensions

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

Instruction set extensionsMMX, 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, SME86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2
AES-NI++
FMA+-
AVX++
Precision Boost 2no data+

Virtualization technologies

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

AMD-V-+

Memory specs

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

Supported memory typesDDR5DDR4-3200
Maximum memory sizeno data128 GB
Max memory channelsno data2
Maximum memory bandwidthno data51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardAMD Radeon 610MN/A

Peripherals

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

PCIe versionno data4.0
PCI Express lanesno data24

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 7940HX 34.92
+73.6%
Ryzen 9 3900 20.12

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 7940HX 53448
+73.6%
Ryzen 9 3900 30796

Gaming performance

Pros & cons summary


Performance score 34.92 20.12
Recency 17 January 2024 24 September 2019
Physical cores 16 12
Threads 32 24
Chip lithography 5 nm 7 nm
Power consumption (TDP) 55 Watt 65 Watt

Ryzen 9 7940HX has a 73.6% higher aggregate performance score, an age advantage of 4 years, 33.3% more physical cores and 33.3% more threads, a 40% more advanced lithography process, and 18.2% lower power consumption.

The Ryzen 9 7940HX is our recommended choice as it beats the Ryzen 9 3900 in performance tests.

Be aware that Ryzen 9 7940HX is a notebook processor while Ryzen 9 3900 is a desktop one.


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

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AMD Ryzen 9 7940HX
Ryzen 9 7940HX
AMD Ryzen 9 3900
Ryzen 9 3900

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Community ratings

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Questions & comments

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