Mobility Radeon HD 4870 X2 vs Quadro K620M

Find out if it is worth upgrading your current GPU setup by comparing Mobility Radeon HD 4870 X2 and Quadro K620M. 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 Mobility Radeon HD 4870 X2 and Quadro K620M. 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.

Mobility Radeon HD 4870 X2 and Quadro K620M are Laptop Graphics Cards

Note: Mobility Radeon HD 4870 X2 and Quadro K620M 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 X2 or Quadro K620M here:

Main Specs

  Mobility Radeon HD 4870 X2 Quadro K620M
Power consumption (TDP) 30 Watt
Interface PCIe 2.0 x16 MXM-A (3.0)
Supplementary power connectors None
Memory type GDDR3, GDDR5 DDR3
Maximum RAM amount 2 GB 2 GB
Display Connectors No outputs No outputs
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  • Mobility Radeon HD 4870 X2 is connected by PCIe 2.0 x16, and Quadro K620M uses MXM-A (3.0) interface.
  • Mobility Radeon HD 4870 X2 and Quadro K620M have maximum RAM of 2 GB.
  • Mobility Radeon HD 4870 X2 is used in Laptops, and Quadro K620M - in Mobile workstations.
  • Mobility Radeon HD 4870 X2 is build with Terascale 1 architecture, and Quadro K620M - with Maxwell.
  • Core clock speed of Quadro K620M is 479 MHz higher, than Mobility Radeon HD 4870 X2.
  • Mobility Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Quadro K620M - by 28 nm process technology.
  • Memory clock speed of Quadro K620M is 1112 MHz higher, than Mobility Radeon HD 4870 X2.

Game benchmarks

high / 1080p 9−10 3−4
ultra / 1080p 5−6 1−2
QHD / 1440p 0−1 0−1
low / 720p 21−24 14−16
medium / 1080p 12−14 5−6
The average gaming FPS of Mobility Radeon HD 4870 X2 in Assassin's Creed Odyssey is 100% more, than Quadro K620M.

Full Specs

  Mobility Radeon HD 4870 X2 Quadro K620M
Architecture Terascale 1 Maxwell
Code name M98-XT GM108
Type Laptop Mobile workstation
Release date 9 January 2009 1 March 2015
Pipelines 1600 384
Core clock speed 550 MHz 1029 MHz
Boost Clock 1124 MHz
Transistor count 956 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 22.00 17.98
Floating-point performance 2x 880.0 gflops 863.2 gflops
Memory bus width 256 Bit 64 Bit
Memory clock speed 888 MHz 2000 MHz
Memory bandwidth 89.6 GB/s 14.4 GB/s
Shared memory - -
DirectX 10.1 (10_1) 12
Shader Model 4.1 5
OpenGL 3.3 4.5
OpenCL 1.1 1.2
Vulkan N/A 1.1.126
CUDA +
Bitcoin / BTC (SHA256) 92 Mh/s
Laptop size large
Optimus +
Display Port 1.2
nView Display Management +
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