Tesla K20X vs Tesla P4

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Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking241not rated
Place by popularitynot in top-100not in top-100
Power efficiency21.16no data
ArchitecturePascal (2016−2021)Kepler (2012−2018)
GPU code nameGP104GK110
Market segmentWorkstationWorkstation
Release date13 September 2016 (8 years ago)12 November 2012 (12 years ago)
Launch price (MSRP)no data$7,699

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores25602688
Core clock speed886 MHz732 MHz
Boost clock speed1114 MHzno data
Number of transistors7,200 million7,080 million
Manufacturing process technology16 nm28 nm
Power consumption (TDP)75 Watt235 Watt
Texture fill rate178.2164.0
Floating-point processing power5.704 TFLOPS3.935 TFLOPS
ROPs6448
TMUs160224

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

InterfacePCIe 3.0 x16PCIe 3.0 x16
Length168 mm267 mm
Width1-slot2-slot
Supplementary power connectorsNone1x 6-pin + 1x 8-pin

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeGDDR5GDDR5
Maximum RAM amount8 GB6 GB
Memory bus width256 Bit384 Bit
Memory clock speed1502 MHz1300 MHz
Memory bandwidth192.3 GB/s249.6 GB/s

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display ConnectorsNo outputsNo outputs

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX12 (12_1)12 (11_0)
Shader Model6.45.1
OpenGL4.64.6
OpenCL1.21.2
Vulkan1.2.1311.1.126
CUDA6.13.5

Pros & cons summary


Recency 13 September 2016 12 November 2012
Maximum RAM amount 8 GB 6 GB
Chip lithography 16 nm 28 nm
Power consumption (TDP) 75 Watt 235 Watt

Tesla P4 has an age advantage of 3 years, a 33.3% higher maximum VRAM amount, a 75% more advanced lithography process, and 213.3% lower power consumption.

We couldn't decide between Tesla P4 and Tesla K20X. We've got no test results to judge.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

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NVIDIA Tesla P4
Tesla P4
NVIDIA Tesla K20X
Tesla K20X

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Community ratings

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4.5 73 votes

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3.2 51 vote

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Questions & comments

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