Ryzen 9 3950X vs Phenom II X4 945 (95W)

Primary details

Comparing Phenom II X4 945 (95W) and Ryzen 9 3950X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot rated201
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data17.87
Market segmentDesktop processorDesktop processor
Seriesno dataAMD Ryzen 9
Power efficiencyno data21.99
Architecture codenameDeneb (2009−2011)Matisse (Zen 2) (2019−2020)
Release date22 July 2009 (15 years ago)11 June 2019 (5 years ago)
Launch price (MSRP)no data$799

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Phenom II X4 945 (95W) and Ryzen 9 3950X 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 GHz3.5 GHz
Boost clock speed3 GHz4.7 GHz
L1 cache128 KB (per core)1 MB
L2 cache512 KB (per core)8 MB
L3 cache6 MB (shared)64 MB
Chip lithography45 nm7 nm, 12 nm
Die size258 mm22 x 72 mm + 125 mm (IO-Die) mm2
Number of transistors758 million19,200 million
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier-+

Compatibility

Information on Phenom II X4 945 (95W) and Ryzen 9 3950X 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 (Uniprocessor)
SocketAM3AM4
Power consumption (TDP)95 Watt105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X4 945 (95W) and Ryzen 9 3950X. You'll probably need this information if you require some particular technology.

Instruction set extensionsno data86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2
AES-NI-+
AVX-+
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X4 945 (95W) and Ryzen 9 3950X are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X4 945 (95W) and Ryzen 9 3950X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4 Dual-channel
Maximum memory sizeno data128 GB
Maximum memory bandwidthno data51.196 GB/s
ECC memory support-+

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 (95W) and Ryzen 9 3950X.

PCIe version2.0no data

Pros & cons summary


Recency 22 July 2009 11 June 2019
Physical cores 4 16
Threads 4 32
Chip lithography 45 nm 7 nm
Power consumption (TDP) 95 Watt 105 Watt

Phenom II X4 945 (95W) has 10.5% lower power consumption.

Ryzen 9 3950X, on the other hand, has an age advantage of 9 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 (95W) and Ryzen 9 3950X. We've got no test results to judge.


Should you still have questions on choice between Phenom II X4 945 (95W) and Ryzen 9 3950X, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


AMD Phenom II X4 945 (95W)
Phenom II X4 945 (95W)
AMD Ryzen 9 3950X
Ryzen 9 3950X

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4 715 votes

Rate Phenom II X4 945 (95W) on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.5 711 votes

Rate Ryzen 9 3950X on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Phenom II X4 945 (95W) or Ryzen 9 3950X, agree or disagree with our judgements, or report an error or mismatch.