A40 PCIe vs Radeon RX 5900

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Primary details

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

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
ArchitectureRDNA 2.0 (2020−2024)Ampere (2020−2024)
GPU code nameNavi 21GA102
Market segmentDesktopWorkstation
Release dateno data5 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 cores409610752
Core clock speedno data1305 MHz
Boost clock speed1635 MHz1755 MHz
Number of transistors21,000 million28,300 million
Manufacturing process technology7 nm8 nm
Power consumption (TDP)300 Watt300 Watt
Texture fill rate418.6589.7
Floating-point processing power13.39 TFLOPS37.74 TFLOPS
ROPs96112
TMUs256336
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 4.0 x16PCIe 4.0 x16
Lengthno data267 mm
Width2-slot2-slot
Supplementary power connectors2x 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 typeGDDR6GDDR6
Maximum RAM amount12 GB48 GB
Memory bus width384 Bit384 Bit
Memory clock speed14000 MHz1812 MHz
Memory bandwidth672.0 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 Connectors1x HDMI, 3x DisplayPort3x DisplayPort
HDMI+-

API compatibility

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

DirectX12 Ultimate (12_1)12 Ultimate (12_2)
Shader Modelno data6.5
OpenGL4.64.6
OpenCLno data2.0
Vulkan-1.2
CUDA-8.6

Pros & cons summary


Maximum RAM amount 12 GB 48 GB
Chip lithography 7 nm 8 nm

RX 5900 has a 14.3% more advanced lithography process.

A40 PCIe, on the other hand, has a 300% higher maximum VRAM amount.

We couldn't decide between Radeon RX 5900 and A40 PCIe. We've got no test results to judge.

Be aware that Radeon RX 5900 is a desktop card while A40 PCIe is a workstation one.


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

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AMD Radeon RX 5900
Radeon RX 5900
NVIDIA A40 PCIe
A40 PCIe

Comparisons with similar GPUs

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Community ratings

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3.5 15 votes

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4.6 88 votes

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Questions & comments

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