Ryzen Threadripper PRO 3955WX vs Phenom II X4 945 (125W)

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Primary details

Comparing Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot rated200
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorServer
Seriesno dataAMD Ryzen Threadripper
Power efficiencyno data8.57
Architecture codenameDeneb (2009−2011)Matisse (2019−2020)
Release date23 April 2009 (15 years ago)14 July 2020 (4 years ago)

Detailed specifications

Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX 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 GHz3.9 GHz
Boost clock speed3 GHz4.3 GHz
Multiplierno data39
L1 cache128 KB (per core)64K (per core)
L2 cache512 KB (per core)512K (per core)
L3 cache6 MB (shared)64 MB
Chip lithography45 nm7 nm, 12 nm
Die size258 mm274 mm2
Maximum case temperature (TCase)no data95 °C
Number of transistors758 million3,800 million
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier-+

Compatibility

Information on Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX 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
SocketAM3TR4
Power consumption (TDP)125 Watt280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX. You'll probably need this information if you require some particular technology.

AES-NI-+
AVX-+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4-3200
Maximum memory sizeno data2 TiB
Maximum memory bandwidthno data204.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)-

Peripherals

Specifications and connection of peripherals supported by Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX.

PCIe version2.04.0
PCI Express lanesno data128

Pros & cons summary


Recency 23 April 2009 14 July 2020
Physical cores 4 16
Threads 4 32
Chip lithography 45 nm 7 nm
Power consumption (TDP) 125 Watt 280 Watt

Phenom II X4 945 (125W) has 124% lower power consumption.

Ryzen Threadripper PRO 3955WX, on the other hand, has an age advantage of 11 years, 300% more physical cores and 700% more threads, and a 542.9% more advanced lithography process.

We couldn't decide between Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX. We've got no test results to judge.

Note that Phenom II X4 945 (125W) is a desktop processor while Ryzen Threadripper PRO 3955WX is a server/workstation one.


Should you still have questions on choice between Phenom II X4 945 (125W) and Ryzen Threadripper PRO 3955WX, ask them in Comments section, and we shall answer.

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AMD Phenom II X4 945 (125W)
Phenom II X4 945 (125W)
AMD Ryzen Threadripper PRO 3955WX
Ryzen Threadripper PRO 3955WX

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Community ratings

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3.7 80 votes

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Questions & comments

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