Mobility Radeon HD 4870 vs Mobility Radeon HD 4870 X2

If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4870 and Mobility Radeon HD 4870 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 Mobility Radeon HD 4870 stacks up against Mobility Radeon HD 4870 X2, check out specs charts below.

Mobility Radeon HD 4870 and Mobility Radeon HD 4870 X2 are Laptop Graphics Cards

Note: Mobility Radeon HD 4870 and Mobility Radeon HD 4870 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 Mobility Radeon HD 4870 or Mobility Radeon HD 4870 X2 here:

Main Specs

  Mobility Radeon HD 4870 Mobility Radeon HD 4870 X2
Interface PCIe 2.0 x16 PCIe 2.0 x16
Memory type GDDR5 GDDR3, GDDR5
Maximum RAM amount 1 GB 2 GB
Display Connectors No outputs No outputs
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  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Mobility Radeon HD 4870 X2 has 1 GB more memory, than Mobility Radeon HD 4870.
  • Both cards are used in Laptops.
  • Mobility Radeon HD 4870 and Mobility Radeon HD 4870 X2 are build with Terascale 1 architecture.
  • Both graphics cards have the same core clock speed.
  • Mobility Radeon HD 4870 and Mobility Radeon HD 4870 X2 are manufactured by 55 nm process technology.
  • Memory clock speed of Mobility Radeon HD 4870 and Mobility Radeon HD 4870 X2 is 888 MHz.

Game benchmarks

high / 1080p 7−8 9−10
ultra / 1080p 4−5 5−6
QHD / 1440p 0−1 0−1
low / 720p 16−18 21−24
medium / 1080p 8−9 12−14
The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 33% more, than Mobility Radeon HD 4870.

Full Specs

  Mobility Radeon HD 4870 Mobility Radeon HD 4870 X2
Architecture Terascale 1 Terascale 1
Code name M98-XT M98-XT
Type Laptop Laptop
Release date 9 January 2009 9 January 2009
Pipelines 800 1600
Core clock speed 550 MHz 550 MHz
Transistor count 956 million 956 million
Manufacturing process technology 55 nm 55 nm
Texture fill rate 22.00 22.00
Floating-point performance 880.0 gflops 2x 880.0 gflops
Memory bus width 256 Bit 256 Bit
Memory clock speed 888 MHz 888 MHz
Memory bandwidth 56.83 GB/s 89.6 GB/s
Shared memory - -
DirectX 10.1 (10_1) 10.1 (10_1)
Shader Model 4.1 4.1
OpenGL 3.3 3.3
OpenCL 1.1 1.1
Vulkan N/A N/A
Laptop size large large
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