A40 PCIe 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)Ampere (2020−2024)
GPU code nameGP104GA102
Market segmentWorkstationWorkstation
Release date13 September 2016 (8 years ago)5 October 2020 (4 years ago)

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 cores256010752
Core clock speed886 MHz1305 MHz
Boost clock speed1114 MHz1755 MHz
Number of transistors7,200 million28,300 million
Manufacturing process technology16 nm8 nm
Power consumption (TDP)75 Watt300 Watt
Texture fill rate178.2589.7
Floating-point processing power5.704 TFLOPS37.74 TFLOPS
ROPs64112
TMUs160336
Tensor Coresno data336
Ray Tracing Coresno data84

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 4.0 x16
Length168 mm267 mm
Width1-slot2-slot
Supplementary power connectorsNone8-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 typeGDDR5GDDR6
Maximum RAM amount8 GB48 GB
Memory bus width256 Bit384 Bit
Memory clock speed1502 MHz1812 MHz
Memory bandwidth192.3 GB/s695.8 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 outputs3x DisplayPort

API compatibility

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

DirectX12 (12_1)12 Ultimate (12_2)
Shader Model6.46.5
OpenGL4.64.6
OpenCL1.22.0
Vulkan1.2.1311.2
CUDA6.18.6

Pros & cons summary


Recency 13 September 2016 5 October 2020
Maximum RAM amount 8 GB 48 GB
Chip lithography 16 nm 8 nm
Power consumption (TDP) 75 Watt 300 Watt

Tesla P4 has 300% lower power consumption.

A40 PCIe, on the other hand, has an age advantage of 4 years, a 500% higher maximum VRAM amount, and a 100% more advanced lithography process.

We couldn't decide between Tesla P4 and A40 PCIe. 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 A40 PCIe
A40 PCIe

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Community ratings

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4.5 73 votes

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4.6 88 votes

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