Ryzen 9 3900 vs Ryzen 9 8945H

VS

Aggregate performance score

Ryzen 9 8945H
2023
8 cores / 16 threads, 45 Watt
19.29
Ryzen 9 3900
2019
12 cores / 24 threads, 65 Watt
19.34
+0.3%

Primary details

Comparing Ryzen 9 8945H and Ryzen 9 3900 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking304300
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data20.74
Market segmentLaptopDesktop processor
SeriesAMD Hawk Point (Zen 4/4c, Ryzen 8040)AMD Matisse (Ryzen 3000 Desktop)
Power efficiency40.5728.16
Architecture codenameHawk Point-HS (Zen 4) (2023−2024)Matisse (Zen 2) (2019−2020)
Release date6 December 2023 (1 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 8945H 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 cores8 (Octa-Core)12 (Dodeca-Core)
Threads1624
Base clock speed4 GHz3.1 GHz
Boost clock speed5.2 GHz4.3 GHz
L1 cache512 KB768 KB
L2 cache8 MB6 MB
L3 cache16 MB64 MB
Chip lithography4 nm7 nm, 12 nm
Die size178 mm22x 74 mm2
Maximum core temperature100 °Cno data
Number of transistorsno data7,600 million
64 bit support++
Windows 11 compatibilityno data-
Unlocked multiplier-+

Compatibility

Information on Ryzen 9 8945H 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
SocketFP7/FP7r2/FP8AM4
Power consumption (TDP)45 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 8945H and Ryzen 9 3900. 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, 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 8945H and Ryzen 9 3900 are enumerated here.

AMD-V-+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 8945H 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 780M ( - 2800 MHz)N/A

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 8945H 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 8945H 19.29
Ryzen 9 3900 19.34
+0.3%

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 8945H 30643
Ryzen 9 3900 30722
+0.3%

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 8945H 7594
+33.2%
Ryzen 9 3900 5700

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 8945H 46572
+5.4%
Ryzen 9 3900 44191

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 8945H 15476
+12%
Ryzen 9 3900 13817

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 8945H 29
Ryzen 9 3900 31
+6.2%

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 8945H 2691
Ryzen 9 3900 2804
+4.2%

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 8945H 284
+44.2%
Ryzen 9 3900 197

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 8945H 3.28
+47.7%
Ryzen 9 3900 2.22

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 8945H 15.1
+45.2%
Ryzen 9 3900 10.4

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 8945H 7542
+5.5%
Ryzen 9 3900 7145

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 8945H 150
+13.8%
Ryzen 9 3900 132

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 8945H 292
+14.4%
Ryzen 9 3900 256

Geekbench 5.5 Multi-Core

Ryzen 9 8945H 11980
+17.6%
Ryzen 9 3900 10190

Blender(-)

Ryzen 9 8945H 182
+1.7%
Ryzen 9 3900 179

Geekbench 5.5 Single-Core

Ryzen 9 8945H 1994
+60%
Ryzen 9 3900 1246

7-Zip Single

Ryzen 9 8945H 6664
+29.8%
Ryzen 9 3900 5134

7-Zip

Ryzen 9 8945H 72851
Ryzen 9 3900 75612
+3.8%

WebXPRT 3

Ryzen 9 8945H 309
+35.9%
Ryzen 9 3900 227

Gaming performance

Pros & cons summary


Performance score 19.29 19.34
Recency 6 December 2023 24 September 2019
Physical cores 8 12
Threads 16 24
Chip lithography 4 nm 7 nm
Power consumption (TDP) 45 Watt 65 Watt

Ryzen 9 8945H has an age advantage of 4 years, a 75% more advanced lithography process, and 44.4% lower power consumption.

Ryzen 9 3900, on the other hand, has a 0.3% higher aggregate performance score, and 50% more physical cores and 50% more threads.

Given the minimal performance differences, no clear winner can be declared between Ryzen 9 8945H and Ryzen 9 3900.

Be aware that Ryzen 9 8945H is a notebook processor while Ryzen 9 3900 is a desktop one.


Should you still have questions on choice between Ryzen 9 8945H and Ryzen 9 3900, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 8945H
Ryzen 9 8945H
AMD Ryzen 9 3900
Ryzen 9 3900

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