GeForce 940MX vs Mobility Radeon HD 4870 X2

Find out if it is worth upgrading your current GPU setup by comparing GeForce 940MX and Mobility Radeon HD 4870 X2. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between GeForce 940MX and Mobility Radeon HD 4870 X2. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

GeForce 940MX and Mobility Radeon HD 4870 X2 are Laptop Graphics Cards

Note: GeForce 940MX 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 GeForce 940MX or Mobility Radeon HD 4870 X2 here:

Main Specs

  GeForce 940MX Mobility Radeon HD 4870 X2
Power consumption (TDP) 23 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors None
Memory type DDR3, GDDR5 GDDR3, GDDR5
Maximum RAM amount 4 GB 2 GB
Display Connectors No outputs No outputs
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  • GeForce 940MX is connected by PCIe 3.0 x8, and Mobility Radeon HD 4870 X2 uses PCIe 2.0 x16 interface.
  • GeForce 940MX has 2 GB more memory, than Mobility Radeon HD 4870 X2.
  • Both cards are used in Laptops.
  • GeForce 940MX is build with Maxwell architecture, and Mobility Radeon HD 4870 X2 - with Terascale 1.
  • Core clock speed of GeForce 940MX is 572 MHz higher, than Mobility Radeon HD 4870 X2.
  • GeForce 940MX is manufactured by 28 nm process technology, and Mobility Radeon HD 4870 X2 - by 55 nm process technology.
  • Memory clock speed of GeForce 940MX is 3112 MHz higher, than Mobility Radeon HD 4870 X2.

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 GeForce 940MX.

Full Specs

  GeForce 940MX Mobility Radeon HD 4870 X2
Architecture Maxwell Terascale 1
Code name N16S-GTR-B/S M98-XT
Type Laptop Laptop
Release date 10 March 2016 9 January 2009
Pipelines 384 1600
Core clock speed 1122 MHz 550 MHz
Boost Clock 1242 MHz
Transistor count 1,870 million 956 million
Manufacturing process technology 28 nm 55 nm
Texture fill rate 23.83 22.00
Floating-point performance 762.6 gflops 2x 880.0 gflops
Memory bus width 64 Bit 256 Bit
Memory clock speed 4000 MHz 888 MHz
Memory bandwidth 40.1 GB/s 89.6 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 N/A
CUDA +
Bus support PCI Express 3.0
Bitcoin / BTC (SHA256) 102 Mh/s
Laptop size medium sized large
Optimus +
GPU Boost 2.0
GameWorks +
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