Ryzen Threadripper PRO 9955WX vs A9-9420

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Aggregate performance score

A9-9420
2016
2 cores / 2 threads, 15 Watt
0.88
Ryzen Threadripper PRO 9955WX
2025
16 cores / 32 threads, 350 Watt
39.94
+4439%

Ryzen Threadripper PRO 9955WX outperforms A9-9420 by a whopping 4439% based on our aggregate benchmark results.

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking270771
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data26.83
Market segmentLaptopDesktop processor
SeriesAMD Bristol Ridgeno data
Power efficiency2.474.81
DesignerAMDAMD
ManufacturerGlobalFoundriesTSMC
Architecture codenameStoney Ridge (2016−2019)Shimada Peak (2025)
Release date31 May 2016 (9 years ago)23 July 2025 (recently)
Launch price (MSRP)no data$1,649

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Performance to price scatter graph

Detailed specifications

A9-9420 and Ryzen Threadripper PRO 9955WX 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 cores2 (Dual-core)16 (Hexadeca-Core)
Threads232
Base clock speed3 GHz4.5 GHz
Boost clock speed3.6 GHz5.4 GHz
L1 cache160 KB64 KB (per core)
L2 cache1 MB (shared)1 MB (per core)
L3 cache0 KB64 MB (shared)
Chip lithography28 nm4 nm
Die size125 mm22x 70.6 mm2
Maximum core temperature90 °Cno data
Maximum case temperature (TCase)74 °Cno data
Number of transistors1,200 million16,630 million
64 bit support++
Windows 11 compatibility-no data
Unlocked multiplier-+

Compatibility

Information on A9-9420 and Ryzen Threadripper PRO 9955WX 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
SocketFT4sTR5
Power consumption (TDP)15 Watt350 Watt

Technologies and extensions

Technological solutions and additional instructions supported by A9-9420 and Ryzen Threadripper PRO 9955WX. You'll probably need this information if you require some particular technology.

Instruction set extensionsVirtualization,no data
AES-NI++
FMA+-
AVX++
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by A9-9420 and Ryzen Threadripper PRO 9955WX are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by A9-9420 and Ryzen Threadripper PRO 9955WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardRadeon R5N/A

Peripherals

Specifications and connection of peripherals supported by A9-9420 and Ryzen Threadripper PRO 9955WX.

PCIe version3.05.0
PCI Express lanes8136

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.

A9-9420 0.88
Ryzen Threadripper PRO 9955WX 39.94
+4439%

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. Other than that, Passmark measures multi-core performance.

A9-9420 1536
Ryzen Threadripper PRO 9955WX 69993
+4457%

Gaming performance

Pros & cons summary


Performance score 0.88 39.94
Recency 31 May 2016 23 July 2025
Physical cores 2 16
Threads 2 32
Chip lithography 28 nm 4 nm
Power consumption (TDP) 15 Watt 350 Watt

A9-9420 has 2233.3% lower power consumption.

Ryzen Threadripper PRO 9955WX, on the other hand, has a 4438.6% higher aggregate performance score, an age advantage of 9 years, 700% more physical cores and 1500% more threads, and a 600% more advanced lithography process.

The AMD Ryzen Threadripper PRO 9955WX is our recommended choice as it beats the AMD A9-9420 in performance tests.

Be aware that A9-9420 is a notebook processor while Ryzen Threadripper PRO 9955WX is a desktop one.

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AMD A9-9420
A9-9420
AMD Ryzen Threadripper PRO 9955WX
Ryzen Threadripper PRO 9955WX

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Community ratings

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