Ryzen Threadripper PRO 9955WX vs Athlon X4 845

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Aggregate performance score

Athlon X4 845
2016
4 cores / 4 threads, 65 Watt
2.16
Ryzen Threadripper PRO 9955WX
2025
16 cores / 32 threads, 350 Watt
40.04
+1754%

Ryzen Threadripper PRO 9955WX outperforms Athlon X4 845 by a whopping 1754% based on our aggregate benchmark results.

Primary details

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

Place in the ranking197971
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data26.81
Market segmentDesktop processorDesktop processor
Power efficiency1.404.81
DesignerAMDAMD
ManufacturerGlobalFoundriesTSMC
Architecture codenameCarrizo (2015−2018)Shimada Peak (2025)
Release date2 February 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

Athlon X4 845 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 cores4 (Quad-Core)16 (Hexadeca-Core)
Threads432
Base clock speed3.5 GHz4.5 GHz
Boost clock speed3.8 GHz5.4 GHz
L1 cache320K64 KB (per core)
L2 cache2 MB1 MB (per core)
L3 cacheno data64 MB (shared)
Chip lithography28 nm4 nm
Die size250 mm22x 70.6 mm2
Maximum case temperature (TCase)74 °Cno data
Number of transistors3,100 million16,630 million
64 bit support++
Unlocked multiplier++

Compatibility

Information on Athlon X4 845 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
SocketFM2+sTR5
Power consumption (TDP)65 Watt350 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon X4 845 and Ryzen Threadripper PRO 9955WX. You'll probably need this information if you require some particular technology.

AES-NI++
FMA+-
AVX++
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon X4 845 and Ryzen Threadripper PRO 9955WX are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon X4 845 and Ryzen Threadripper PRO 9955WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3-2133DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataN/A

Peripherals

Specifications and connection of peripherals supported by Athlon X4 845 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.

Athlon X4 845 2.16
Ryzen Threadripper PRO 9955WX 40.04
+1754%

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.

Athlon X4 845 3783
Ryzen Threadripper PRO 9955WX 69993
+1750%

Gaming performance

Pros & cons summary


Performance score 2.16 40.04
Recency 2 February 2016 23 July 2025
Physical cores 4 16
Threads 4 32
Chip lithography 28 nm 4 nm
Power consumption (TDP) 65 Watt 350 Watt

Athlon X4 845 has 438.5% lower power consumption.

Ryzen Threadripper PRO 9955WX, on the other hand, has a 1753.7% higher aggregate performance score, an age advantage of 9 years, 300% more physical cores and 700% more threads, and a 600% more advanced lithography process.

The AMD Ryzen Threadripper PRO 9955WX is our recommended choice as it beats the AMD Athlon X4 845 in performance tests.

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AMD Athlon X4 845
Athlon X4 845
AMD Ryzen Threadripper PRO 9955WX
Ryzen Threadripper PRO 9955WX

Other comparisons

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Community ratings

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