Radeon R6 Kaveri vs Radeon RX 640

In this comparison between Radeon R6 Kaveri and Radeon RX 640 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Radeon R6 Kaveri will be the best choice, for others Radeon RX 640 will be their preference. Study the comparison tables below and make your choice.

Radeon R6 Kaveri and Radeon RX 640 are Laptop Graphics Cards

Note: Radeon R6 Kaveri and Radeon RX 640 are only used in laptop graphics. They have lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Radeon R6 Kaveri or Radeon RX 640 here:

Main Specs

  Radeon R6 Kaveri Radeon RX 640
Power consumption (TDP) 50 Watt
Interface PCIe 3.0 x8
Supplementary power connectors None
Memory type GDDR5
Maximum RAM amount 4 GB
Display Connectors 1x DVI, 1x HDMI, 1x DisplayPort
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  • Both cards are used in Laptops.
  • Radeon R6 Kaveri is build with GCN 1.1 architecture, and Radeon RX 640 - with Polaris.
  • Core clock speed of Radeon RX 640 is 685 MHz higher, than Radeon R6 Kaveri.
  • Radeon R6 Kaveri is manufactured by 28 nm process technology, and Radeon RX 640 - by 14 nm process technology.

Game benchmarks

high / 1080p 0−1 5−6
ultra / 1080p 3−4
QHD / 1440p 0−1 2−3
low / 720p 1−2 16−18
medium / 1080p 0−1 7−8
The average gaming FPS of Radeon RX 640 in Assassin's Creed Odyssey is 1600% more, than Radeon R6 Kaveri.

Full Specs

  Radeon R6 Kaveri Radeon RX 640
Architecture GCN 1.1 Polaris
Code name Kaveri Polaris 12
Type Laptop Laptop
Release date 4 June 2014 12 August 2019
Pipelines 384 640
Core clock speed 533 MHz 1218 MHz
Boost Clock 654 MHz 1218 MHz
Transistor count 2410 Million 2,200 million
Manufacturing process technology 28 nm 14 nm
Texture fill rate 38.98
Memory bus width 64/128 Bit 64 Bit
Memory clock speed 6000 MHz
Memory bandwidth 112.0 GB/s
Shared memory + -
DirectX DirectX 12 (FL 12_0), Shader 5.0 12 (12_0)
Shader Model 6.4
OpenGL 4.6
OpenCL 2.0
Vulkan 1.2.131
FreeSync +
Laptop size medium sized large
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