Mobility Radeon HD 3870 X2 vs Radeon HD 6950M

When comparing Mobility Radeon HD 3870 X2 and Radeon HD 6950M, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between Mobility Radeon HD 3870 X2 and Radeon HD 6950M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Mobility Radeon HD 3870 X2 and Radeon HD 6950M are Laptop Graphics Cards

Note: Mobility Radeon HD 3870 X2 and Radeon HD 6950M 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 Mobility Radeon HD 3870 X2 or Radeon HD 6950M here:

Main Specs

  Mobility Radeon HD 3870 X2 Radeon HD 6950M
Power consumption (TDP) 110 Watt 50 Watt
Interface PCIe 2.0 x16 MXM-B (3.0)
Memory type GDDR3 GDDR5
Maximum RAM amount 512 MB 2 GB
Display Connectors No outputs No outputs
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  • Mobility Radeon HD 3870 X2 has 120% more power consumption, than Radeon HD 6950M.
  • Mobility Radeon HD 3870 X2 is connected by PCIe 2.0 x16, and Radeon HD 6950M uses MXM-B (3.0) interface.
  • Mobility Radeon HD 3870 X2 has 510 GB more memory, than Radeon HD 6950M.
  • Both cards are used in Laptops.
  • Mobility Radeon HD 3870 X2 is build with RV6xx architecture, and Radeon HD 6950M - with Terascale 2.
  • Core clock speed of Mobility Radeon HD 3870 X2 is 80 MHz higher, than Radeon HD 6950M.
  • Mobility Radeon HD 3870 X2 is manufactured by 55 nm process technology, and Radeon HD 6950M - by 40 nm process technology.
  • Memory clock speed of Radeon HD 6950M is 50 MHz higher, than Mobility Radeon HD 3870 X2.

Game benchmarks

high / 1080p 6−7 8−9
ultra / 1080p 4−5 5−6
QHD / 1440p 0−1 0−1
low / 720p 16−18 20−22
medium / 1080p 8−9 10−12
The average gaming FPS of Radeon HD 6950M in Assassin's Creed Odyssey is 22% more, than Mobility Radeon HD 3870 X2.

Full Specs

  Mobility Radeon HD 3870 X2 Radeon HD 6950M
Architecture RV6xx Terascale 2
Code name M88-XT CF Blackcomb Pro
Type Laptop Laptop
Release date 1 September 2008 6 January 2011
Pipelines 640 960
Core clock speed 660 MHz 580 MHz
Transistor count 666 million 1,700 million
Manufacturing process technology 55 nm 40 nm
Texture fill rate 10.56 27.84
Floating-point performance 2x 422.4 gflops 1,113.6 gflops
Memory bus width 256 Bit 256 Bit
Memory clock speed 850 MHz 900 MHz
Memory bandwidth 54.4 GB/s 115.2 GB/s
Shared memory - -
DirectX 10.1 (10_1) 11.2 (11_0)
Shader Model 4.1 5.0
OpenGL 3.3 4.4
OpenCL N/A 1.2
Vulkan N/A N/A
Laptop size large large
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