Mobility Radeon HD 4870 vs Radeon RX 550

If you are going to buy a new graphics card and are choosing between Mobility Radeon HD 4870 and Radeon RX 550, 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 Radeon RX 550, 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 Radeon RX 550
Power consumption (TDP) 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors None
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 4 GB
Display Connectors No outputs 1x DVI, 1x HDMI, 1x DisplayPort
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  • Mobility Radeon HD 4870 is connected by PCIe 2.0 x16, and Radeon RX 550 uses PCIe 3.0 x8 interface.
  • Radeon RX 550 has 3 GB more memory, than Mobility Radeon HD 4870.
  • Mobility Radeon HD 4870 is used in Laptops, and Radeon RX 550 - in Desktops.
  • Mobility Radeon HD 4870 is build with Terascale 1 architecture, and Radeon RX 550 - with GCN 4.0.
  • Core clock speed of Radeon RX 550 is 550 MHz higher, than Mobility Radeon HD 4870.
  • Mobility Radeon HD 4870 is manufactured by 55 nm process technology, and Radeon RX 550 - by 14 nm process technology.
  • Memory clock speed of Radeon RX 550 is 6112 MHz higher, than Mobility Radeon HD 4870.

Game benchmarks

high / 1080p 7−8 14−16
ultra / 1080p 4−5 8−9
QHD / 1440p 0−1 3−4
low / 720p 16−18 30−33
medium / 1080p 8−9 18−20
The average gaming FPS of Radeon RX 550 in Assassin's Creed Odyssey is 100% more, than Mobility Radeon HD 4870.

Full Specs

  Mobility Radeon HD 4870 Radeon RX 550
Architecture Terascale 1 GCN 4.0
Code name M98-XT Lexa
Type Laptop Desktop
Release date 9 January 2009 20 April 2017
Pipelines 800 512
Core clock speed 550 MHz 1100 MHz
Boost Clock 1183 MHz
Transistor count 956 million 2,200 million
Manufacturing process technology 55 nm 14 nm
Texture fill rate 22.00 37.86
Floating-point performance 880.0 gflops 1,211 gflops
Length 145 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 888 MHz 7000 MHz
Memory bandwidth 56.83 GB/s 112.0 GB/s
Shared memory -
DirectX 10.1 (10_1) 12 (12_0)
Shader Model 4.1 6.4
OpenGL 3.3 4.6
OpenCL 1.1 2.0
Vulkan N/A 1.2.131
Laptop size large
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