Mobility Radeon HD 4870 vs Quadro K620

If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4870 and Quadro K620, 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 Quadro K620, check out specs charts below.

Mobility Radeon HD 4870 is a Laptop Graphics Card

Note: Mobility Radeon HD 4870 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 Mobility Radeon HD 4870 here:

Main Specs

  Mobility Radeon HD 4870 Quadro K620
Power consumption (TDP) 41 Watt
Interface PCIe 2.0 x16 PCIe 2.0 x16
Supplementary power connectors None
Memory type GDDR5 128 Bit
Maximum RAM amount 1 GB 2 GB
Display Connectors No outputs 1x DVI, 1x DisplayPort
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  • Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
  • Quadro K620 has 1 GB more memory, than Mobility Radeon HD 4870.
  • Mobility Radeon HD 4870 is used in Laptops, and Quadro K620 - in Desktops.
  • Mobility Radeon HD 4870 is build with Terascale 1 architecture, and Quadro K620 - with Maxwell.
  • Core clock speed of Quadro K620 is 508 MHz higher, than Mobility Radeon HD 4870.
  • Mobility Radeon HD 4870 is manufactured by 55 nm process technology, and Quadro K620 - by 28 nm process technology.
  • Memory clock speed of Quadro K620 is 912 MHz higher, than Mobility Radeon HD 4870.

Game benchmarks

high / 1080p 7−8 10−12
ultra / 1080p 4−5 6−7
QHD / 1440p 0−1 1−2
low / 720p 16−18 24−27
medium / 1080p 8−9 14−16
The average gaming FPS of Quadro K620 in Assassin's Creed Odyssey is 55% more, than Mobility Radeon HD 4870.

Full Specs

  Mobility Radeon HD 4870 Quadro K620
Architecture Terascale 1 Maxwell
Code name M98-XT GM107
Type Laptop Workstation
Release date 9 January 2009 22 July 2014
Pipelines 800 384
Core clock speed 550 MHz 1058 MHz
Boost Clock 1124 MHz
Transistor count 956 million 1,870 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 22.00 26.98
Floating-point performance 880.0 gflops 863.2 gflops
Length 160 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 888 MHz 1800 MHz
Memory bandwidth 56.83 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 +
CUDA 5.0
Bitcoin / BTC (SHA256) 104 Mh/s
Laptop size large
3D Vision Pro +
Mosaic +
Width 1" (2.5 cm)
Number of simultaneous displays 4
nView Desktop Management +
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