Athlon II X4 651 vs Ryzen 9 3900

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Aggregate performance score

Ryzen 9 3900
2019
12 cores / 24 threads, 65 Watt
19.34
+756%
Athlon II X4 651
2011
4 cores / 4 threads, 100 Watt
2.26

Ryzen 9 3900 outperforms Athlon II X4 651 by a whopping 756% based on our aggregate benchmark results.

Primary details

Comparing Ryzen 9 3900 and Athlon II X4 651 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking3001830
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation20.75no data
Market segmentDesktop processorDesktop processor
SeriesAMD Matisse (Ryzen 3000 Desktop)no data
Power efficiency28.162.14
Architecture codenameMatisse (Zen 2) (2019−2020)Llano (2011−2012)
Release date24 September 2019 (5 years ago)14 November 2011 (13 years ago)
Launch price (MSRP)$499no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Ryzen 9 3900 and Athlon II X4 651 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)4 (Quad-Core)
Threads244
Base clock speed3.1 GHz3 GHz
Boost clock speed4.3 GHz3 GHz
L1 cache64 KB (per core)128 KB (per core)
L2 cache512 KB (per core)1 MB (per core)
L3 cache64 MB0 KB
Chip lithography7 nm, 12 nm32 nm
Die size2x 74 mm2228 mm2
Number of transistors7,600 million1,178 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier+-

Compatibility

Information on Ryzen 9 3900 and Athlon II X4 651 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
SocketAM4FM1
Power consumption (TDP)65 Watt100 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900 and Athlon II X4 651. You'll probably need this information if you require some particular technology.

Instruction set extensions86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2no data
AES-NI+-
AVX+-
Precision Boost 2+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3900 and Athlon II X4 651 are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900 and Athlon II X4 651. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4-3200DDR3
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 cardN/Ano data

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3900 and Athlon II X4 651.

PCIe version4.0no data
PCI Express lanes24no data

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 3900 19.34
+756%
Athlon II X4 651 2.26

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 3900 30722
+757%
Athlon II X4 651 3584

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 3900 1678
+404%
Athlon II X4 651 333

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 3900 9543
+761%
Athlon II X4 651 1108

Gaming performance

Pros & cons summary


Performance score 19.34 2.26
Recency 24 September 2019 14 November 2011
Physical cores 12 4
Threads 24 4
Chip lithography 7 nm 32 nm
Power consumption (TDP) 65 Watt 100 Watt

Ryzen 9 3900 has a 755.8% higher aggregate performance score, an age advantage of 7 years, 200% more physical cores and 500% more threads, a 357.1% more advanced lithography process, and 53.8% lower power consumption.

The Ryzen 9 3900 is our recommended choice as it beats the Athlon II X4 651 in performance tests.


Should you still have questions on choice between Ryzen 9 3900 and Athlon II X4 651, ask them in Comments section, and we shall answer.

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AMD Ryzen 9 3900
Ryzen 9 3900
AMD Athlon II X4 651
Athlon II X4 651

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Community ratings

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Questions & comments

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