Radeon HD 6850 vs Radeon RX 640

When choosing between Radeon HD 6850 and Radeon RX 640, it is worth examining the specifications of the models in detail. Do they meet the recommended requirements of modern games and software? Storage capacity, form factor, TDP, available ports, warranty and manufacturer support are all important. For example, the size of a PC case can limit the maximum thickness and length of the card. Often, instead of the factory overclocked card and RGB backlight, it is better to choose a reference model with a more efficient GPU. And make sure that your current power supply unit has the correct connection pins (using adapters is not recommended). This GPUs compare tool is meant to help you to choose the best graphics card for your build. Let's find out the difference between Radeon HD 6850 and Radeon RX 640.

Radeon RX 640 is a Laptop Graphics Card

Note: Radeon RX 640 is only used in laptop graphics. It has 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 RX 640 here:

Main Specs

  Radeon HD 6850 Radeon RX 640
Power consumption (TDP) 127 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 1x 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 2x mini-DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 6850 has 154% more power consumption, than Radeon RX 640.
  • Radeon HD 6850 is connected by PCIe 2.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
  • Radeon RX 640 has 3 GB more memory, than Radeon HD 6850.
  • Radeon HD 6850 is used in Desktops, and Radeon RX 640 - in Laptops.
  • Radeon HD 6850 is build with TeraScale 2 architecture, and Radeon RX 640 - with Polaris.
  • Radeon HD 6850 is manufactured by 40 nm process technology, and Radeon RX 640 - by 14 nm process technology.

Game benchmarks

high / 1080p 9−10 5−6
ultra / 1080p 5−6 3−4
QHD / 1440p 0−1 2−3
low / 720p 21−24 16−18
medium / 1080p 12−14 7−8
The average gaming FPS of Radeon HD 6850 in Assassin's Creed Odyssey is 50% more, than Radeon RX 640.

Full Specs

  Radeon HD 6850 Radeon RX 640
Architecture TeraScale 2 Polaris
Code name Barts Polaris 12
Type Desktop Laptop
Release date 21 October 2010 12 August 2019
Pipelines 960 640
Core clock speed 1218 MHz
Boost Clock 1218 MHz
Transistor count 1,700 million 2,200 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 37.20 38.98
Floating-point performance 1,488.0 gflops
Length 198 mm
Memory bus width 256 Bit 64 Bit
Memory clock speed 6000 MHz
Memory bandwidth 128.0 GB/s 112.0 GB/s
Shared memory -
DirectX 12 (12_0)
Shader Model 5.0 6.4
OpenGL 4.4 4.6
OpenCL 1.2 2.0
Vulkan 1.2.131
FreeSync +
Bus support AGP
Bitcoin / BTC (SHA256) 139 Mh/s
Laptop size large
Eyefinity +
Design reference
CrossFire +
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