GeForce 920MX vs Radeon HD 4870 X2

If you are going to buy a new graphics card and are choosing between GeForce 920MX and 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 GeForce 920MX stacks up against Radeon HD 4870 X2, check out specs charts below.
Radeon HD 4870 X2

GeForce 920MX is a Laptop Graphics Card

Note: GeForce 920MX 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 GeForce 920MX here:

Main Specs

  GeForce 920MX Radeon HD 4870 X2
Power consumption (TDP) 16 Watt 286 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors None 1x 6-pin + 1x 8-pin
Memory type DDR3, GDDR5 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs 2x DVI, 1x S-Video
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  • Radeon HD 4870 X2 has 1687% more power consumption, than GeForce 920MX.
  • GeForce 920MX is connected by PCIe 3.0 x8, and Radeon HD 4870 X2 uses PCIe 2.0 x16 interface.
  • GeForce 920MX has 1 GB more memory, than Radeon HD 4870 X2.
  • GeForce 920MX is used in Laptops, and Radeon HD 4870 X2 - in Desktops.
  • GeForce 920MX is build with Maxwell architecture, and Radeon HD 4870 X2 - with TeraScale.
  • Core clock speed of GeForce 920MX is 265 MHz higher, than Radeon HD 4870 X2.
  • GeForce 920MX is manufactured by 28 nm process technology, and Radeon HD 4870 X2 - by 55 nm process technology.
  • Memory clock speed of Radeon HD 4870 X2 is 1800 MHz higher, than GeForce 920MX.

Game benchmarks

high / 1080p 2−3 3−4
ultra / 1080p 0−1 1−2
QHD / 1440p 0−1 0−1
low / 720p 12−14 14−16
medium / 1080p 3−4 6−7
The average gaming FPS of Radeon HD 4870 X2 in Assassin's Creed Odyssey is 33% more, than GeForce 920MX.

Full Specs

  GeForce 920MX Radeon HD 4870 X2
Architecture Maxwell TeraScale
Code name N16V-GMR R700
Type Laptop Desktop
Release date 25 March 2015 12 August 2008
Pipelines 256 800
Core clock speed 965 MHz 700 MHz
Boost Clock 993 MHz
Transistor count 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 23.83 28.00
Floating-point performance 602.1 gflops 2x 1,120.0 gflops
Length 267 mm
Memory bus width 64 Bit 256 Bit
Memory clock speed 1800 MHz 3600 MHz
Memory bandwidth 14.4 GB/s 115.2 GB/s
Shared memory -
DirectX 12 (11_0) 10.1 (10_1)
Shader Model 5.1 4.1
OpenGL 4.5 3.3
OpenCL 1.2 1.1
Vulkan 1.1.126 N/A
CUDA +
Bus support PCI Express 3.0
Optimus +
GPU Boost 2.0
GameWorks +
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