Radeon RX 640 vs RX 580G

Primary details

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

Place in the rankingnot rated616
Place by popularitynot in top-100not in top-100
Power efficiencyno data7.29
ArchitectureGCN 4.0 (2016−2020)GCN 4.0 (2016−2020)
GPU code namePolaris 20Polaris 23
Market segmentDesktopLaptop
Release date15 October 2018 (6 years ago)13 May 2019 (5 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 cores2304640
Core clock speed1257 MHz1082 MHz
Boost clock speed1330 MHz1218 MHz
Number of transistors5,700 million2,200 million
Manufacturing process technology14 nm14 nm
Power consumption (TDP)185 Watt50 Watt
Texture fill rate191.548.72
Floating-point processing power6.129 TFLOPS1.559 TFLOPS
ROPs3216
TMUs14440

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).

Laptop sizeno datalarge
InterfacePCIe 3.0 x16PCIe 3.0 x8
Length241 mmno data
Width2-slotno data
Supplementary power connectors1x 8-pinNone

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 GB2 GB
Memory bus width256 Bit64 Bit
Memory clock speed2000 MHz1500 MHz
Memory bandwidth256.0 GB/s48 GB/s
Shared memory--

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 DisplayPortNo outputs
HDMI+-

Supported technologies

Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.

FreeSync-+

API compatibility

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

DirectX12 (12_0)12 (12_0)
Shader Model6.46.4
OpenGL4.64.6
OpenCL2.02.0
Vulkan1.2.1311.2.131

Pros & cons summary


Recency 15 October 2018 13 May 2019
Maximum RAM amount 8 GB 2 GB
Power consumption (TDP) 185 Watt 50 Watt

RX 580G has a 300% higher maximum VRAM amount.

RX 640, on the other hand, has an age advantage of 6 months, and 270% lower power consumption.

We couldn't decide between Radeon RX 580G and Radeon RX 640. We've got no test results to judge.

Be aware that Radeon RX 580G is a desktop card while Radeon RX 640 is a notebook 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 580G
Radeon RX 580G
AMD Radeon RX 640
Radeon RX 640

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

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


3.9 26 votes

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3.2 257 votes

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Questions & comments

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