Radeon HD 4870 X2 vs Radeon HD 6850M

When choosing between Radeon HD 4870 X2 and Radeon HD 6850M, 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 4870 X2 and Radeon HD 6850M.

Radeon HD 6850M is a Laptop Graphics Card

Note: Radeon HD 6850M 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 HD 6850M here:

Main Specs

  Radeon HD 4870 X2 Radeon HD 6850M
Power consumption (TDP) 286 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 2.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin
Memory type GDDR5 DDR3, GDDR5
Maximum RAM amount 1 GB 1 GB
Display Connectors 2x DVI, 1x S-Video No outputs
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  • Radeon HD 4870 X2 has 472% more power consumption, than Radeon HD 6850M.
  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Radeon HD 4870 X2 and Radeon HD 6850M have maximum RAM of 1 GB.
  • Radeon HD 4870 X2 is used in Desktops, and Radeon HD 6850M - in Laptops.
  • Radeon HD 4870 X2 is build with TeraScale architecture, and Radeon HD 6850M - with Terascale 2.
  • Core clock speed of Radeon HD 4870 X2 is 125 MHz higher, than Radeon HD 6850M.
  • Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Radeon HD 6850M - by 40 nm process technology.
  • Memory clock speed of Radeon HD 4870 X2 is 2800 MHz higher, than Radeon HD 6850M.

Game benchmarks

high / 1080p 3−4 2−3
ultra / 1080p 1−2 0−1
QHD / 1440p 0−1 0−1
low / 720p 14−16 12−14
medium / 1080p 6−7 3−4
The average gaming FPS of Radeon HD 4870 X2 in Assassin's Creed Odyssey is 33% more, than Radeon HD 6850M.

Full Specs

  Radeon HD 4870 X2 Radeon HD 6850M
Architecture TeraScale Terascale 2
Code name R700 Granville Pro/LP
Type Desktop Laptop
Release date 12 August 2008 6 January 2011
Pipelines 800 800
Core clock speed 700 MHz 575 / 675 MHz
Transistor count 956 million 1,040 million
Manufacturing process technology 55 nm 40 nm
Texture fill rate 28.00 27.00
Floating-point performance 2x 1,120.0 gflops 1,080.0 gflops
Length 267 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 3600 MHz 800 MHz
Memory bandwidth 115.2 GB/s 25.6 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 1.1 1.2
Vulkan N/A N/A
Laptop size large
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