Radeon HD 6950 vs Radeon RX 640

If you are going to buy a new graphics card and are choosing between Radeon HD 6950 and Radeon RX 640, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the Radeon HD 6950 stacks up against Radeon RX 640, check out specs charts below.

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 6950 Radeon RX 640
Power consumption (TDP) 500 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 2x DVI, 1x HDMI, 2x mini-DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 6950 has 900% more power consumption, than Radeon RX 640.
  • Radeon HD 6950 is connected by PCIe 2.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
  • Radeon RX 640 has 2 GB more memory, than Radeon HD 6950.
  • Radeon HD 6950 is used in Desktops, and Radeon RX 640 - in Laptops.
  • Radeon HD 6950 is build with TeraScale 3 architecture, and Radeon RX 640 - with Polaris.
  • Radeon HD 6950 is manufactured by 40 nm process technology, and Radeon RX 640 - by 14 nm process technology.
  • Memory clock speed of Radeon RX 640 is 4750 MHz higher, than Radeon HD 6950.

Game benchmarks

high / 1080p 14−16 5−6
ultra / 1080p 8−9 3−4
QHD / 1440p 3−4 2−3
low / 720p 27−30 16−18
medium / 1080p 16−18 7−8
The average gaming FPS of Radeon HD 6950 in Assassin's Creed Odyssey is 100% more, than Radeon RX 640.

Full Specs

  Radeon HD 6950 Radeon RX 640
Architecture TeraScale 3 Polaris
Code name Cayman Polaris 12
Type Desktop Laptop
Release date 14 December 2010 12 August 2019
Pipelines 1408 640
Core clock speed 1218 MHz
Boost Clock 800 MHz 1218 MHz
Transistor count 2,640 million 2,200 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 70.40 38.98
Floating-point performance 2,252.8 gflops
Length 267 mm
Memory bus width 256 Bit 64 Bit
Memory clock speed 1250 MHz 6000 MHz
Memory bandwidth 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 PCIe 2.0 x16
HDMI +
Bitcoin / BTC (SHA256) 244 Mh/s
Laptop size large
Eyefinity +
Design reference
CrossFire +
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