Radeon R4 Graphics vs HD 7640G

Primary details

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

Place in the ranking1057not rated
Place by popularitynot in top-100not in top-100
Power efficiency2.37no data
ArchitectureTeraScale 3 (2010−2013)GCN 2.0 (2013−2017)
GPU code nameDevastator LiteBeema
Market segmentLaptopDesktop
Release date15 May 2012 (12 years ago)11 June 2014 (10 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 cores256128
Core clock speed496 MHz800 MHz
Boost clock speed685 MHzno data
Number of transistors1,303 million930 million
Manufacturing process technology32 nm28 nm
Power consumption (TDP)35 Watt15 Watt
Texture fill rate10.966.400
Floating-point processing power0.3507 TFLOPS0.2048 TFLOPS
ROPs84
TMUs168

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 sizemedium sizedno data
InterfaceIGPIGP
Widthno dataIGP

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 typeSystem SharedSystem Shared
Maximum RAM amountSystem SharedSystem Shared
Memory bus widthSystem SharedSystem Shared
Memory clock speedSystem SharedSystem Shared
Shared memory+no data

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.

DirectX11.2 (11_0)12 (12_0)
Shader Model5.06.3
OpenGL4.44.6
OpenCL1.22.0
VulkanN/A1.2.131

Pros & cons summary


Recency 15 May 2012 11 June 2014
Chip lithography 32 nm 28 nm
Power consumption (TDP) 35 Watt 15 Watt

R4 Graphics has an age advantage of 2 years, a 14.3% more advanced lithography process, and 133.3% lower power consumption.

We couldn't decide between Radeon HD 7640G and Radeon R4 Graphics. We've got no test results to judge.

Be aware that Radeon HD 7640G is a notebook card while Radeon R4 Graphics is a desktop 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 HD 7640G
Radeon HD 7640G
AMD Radeon R4 Graphics
Radeon R4 Graphics

Comparisons with similar GPUs

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Community ratings

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2.9 166 votes

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2.7 1201 vote

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Questions & comments

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