GeForce 825M vs Mobility Radeon HD 3870 X2

If you are going to buy a new graphics card and are choosing between GeForce 825M and Mobility Radeon HD 3870 X2, 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 GeForce 825M stacks up against Mobility Radeon HD 3870 X2, check out specs charts below.

GeForce 825M and Mobility Radeon HD 3870 X2 are Laptop Graphics Cards

Note: GeForce 825M and Mobility Radeon HD 3870 X2 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 GeForce 825M or Mobility Radeon HD 3870 X2 here:

Main Specs

  GeForce 825M Mobility Radeon HD 3870 X2
Power consumption (TDP) 33 Watt 110 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors None
Memory type DDR3 GDDR3
Maximum RAM amount 2 GB 512 MB
Display Connectors No outputs No outputs
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  • Mobility Radeon HD 3870 X2 has 233% more power consumption, than GeForce 825M.
  • GeForce 825M is connected by PCIe 3.0 x8, and Mobility Radeon HD 3870 X2 uses PCIe 2.0 x16 interface.
  • Mobility Radeon HD 3870 X2 has 510 GB more memory, than GeForce 825M.
  • Both cards are used in Laptops.
  • GeForce 825M is build with Kepler architecture, and Mobility Radeon HD 3870 X2 - with RV6xx.
  • Core clock speed of GeForce 825M is 190 MHz higher, than Mobility Radeon HD 3870 X2.
  • GeForce 825M is manufactured by 28 nm process technology, and Mobility Radeon HD 3870 X2 - by 55 nm process technology.
  • Memory clock speed of GeForce 825M is 950 MHz higher, than Mobility Radeon HD 3870 X2.

Game benchmarks

high / 1080p 0−1 6−7
ultra / 1080p 4−5
QHD / 1440p 0−1 0−1
low / 720p 2−3 16−18
medium / 1080p 0−1 8−9
The average gaming FPS of Mobility Radeon HD 3870 X2 in Assassin's Creed Odyssey is 750% more, than GeForce 825M.

Full Specs

  GeForce 825M Mobility Radeon HD 3870 X2
Architecture Kepler RV6xx
Code name GK208 M88-XT CF
Type Laptop Laptop
Release date 27 January 2014 1 September 2008
Pipelines 384 640
Core clock speed 850 MHz 660 MHz
Boost Clock 941 MHz
Transistor count 915 million 666 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 30.11 10.56
Floating-point performance 722.7 gflops 2x 422.4 gflops
Memory bus width 64 Bit 256 Bit
Memory clock speed 1800 MHz 850 MHz
Memory bandwidth 14.4 GB/s 54.4 GB/s
Shared memory - -
DirectX 12 (11_0) 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.6 3.3
OpenCL 1.2 N/A
Vulkan 1.1.126 N/A
CUDA +
Laptop size medium sized large
Optimus +
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