Tesla P40 vs Tesla K20c

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Aggregate performance score

We've compared Tesla K20c and Tesla P40, covering specs and all relevant benchmarks.

Tesla K20c
2012
5 GB GDDR5, 225 Watt
8.90

Tesla P40 outperforms Tesla K20c by a whopping 255% based on our aggregate benchmark results.

Primary details

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

Place in the ranking483172
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.352.57
Power efficiency2.859.12
ArchitectureKepler (2012−2018)Pascal (2016−2021)
GPU code nameGK110GP102
Market segmentWorkstationWorkstation
Release date12 November 2012 (11 years ago)13 September 2016 (8 years ago)
Launch price (MSRP)$3,199 $5,699

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

Tesla P40 has 634% better value for money than Tesla K20c.

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 cores24963840
Core clock speed706 MHz1303 MHz
Boost clock speedno data1531 MHz
Number of transistors7,080 million11,800 million
Manufacturing process technology28 nm16 nm
Power consumption (TDP)225 Watt250 Watt
Texture fill rate146.8367.4
Floating-point processing power3.524 TFLOPS11.76 TFLOPS
ROPs4096
TMUs208240

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 2.0 x16PCIe 3.0 x16
Length267 mm267 mm
Width2-slot2-slot
Supplementary power connectors1x 6-pin + 1x 8-pin8-pin EPS

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 amount5 GB24 GB
Memory bus width320 Bit384 Bit
Memory clock speed1300 MHz1808 MHz
Memory bandwidth208.0 GB/s347.1 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 (11_0)12 (12_1)
Shader Model5.16.7
OpenGL4.64.6
OpenCL1.23.0
Vulkan1.1.1261.3
CUDA3.56.1

Gaming performance

Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.

Pros & cons summary


Performance score 8.90 31.59
Recency 12 November 2012 13 September 2016
Maximum RAM amount 5 GB 24 GB
Chip lithography 28 nm 16 nm
Power consumption (TDP) 225 Watt 250 Watt

Tesla K20c has 11.1% lower power consumption.

Tesla P40, on the other hand, has a 254.9% higher aggregate performance score, an age advantage of 3 years, a 380% higher maximum VRAM amount, and a 75% more advanced lithography process.

The Tesla P40 is our recommended choice as it beats the Tesla K20c in performance tests.


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 K20c
Tesla K20c
NVIDIA Tesla P40
Tesla P40

Comparisons with similar GPUs

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Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


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Questions & comments

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