Radeon HD 6990 vs Radeon RX 550X mobile

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 6990 and Radeon RX 550X mobile. 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 Radeon HD 6990 and Radeon RX 550X mobile. 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.

Radeon RX 550X mobile is a Laptop Graphics Card

Note: Radeon RX 550X mobile 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 Radeon RX 550X mobile here:

Main Specs

  Radeon HD 6990 Radeon RX 550X mobile
Power consumption (TDP) 375 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 1x DVI, 4x mini-DisplayPort No outputs
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  • Radeon HD 6990 has 650% more power consumption, than Radeon RX 550X mobile.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon RX 550X mobile uses PCIe 3.0 x8 interface.
  • Radeon RX 550X mobile has 2 GB more memory, than Radeon HD 6990.
  • Radeon HD 6990 is used in Desktops, and Radeon RX 550X mobile - in Laptops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon RX 550X mobile - with Polaris.
  • Core clock speed of Radeon RX 550X mobile is 346 MHz higher, than Radeon HD 6990.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon RX 550X mobile - by 14 nm process technology.
  • Memory clock speed of Radeon RX 550X mobile is 2000 MHz higher, than Radeon HD 6990.

Game benchmarks

high / 1080p 14−16 14−16
ultra / 1080p 9−10 9−10
QHD / 1440p 3−4 3−4
low / 720p 30−35 30−35
medium / 1080p 18−20 20−22
The average gaming FPS of Radeon RX 550X mobile in Assassin's Creed Odyssey is 6% more, than Radeon HD 6990.

Full Specs

  Radeon HD 6990 Radeon RX 550X mobile
Architecture TeraScale 3 Polaris
Code name Antilles Polaris 12
Type Desktop Laptop
Release date 8 March 2011 10 January 2019
Pipelines 1536 640
Core clock speed 830 MHz 1176 MHz
Boost Clock 1287 MHz
Transistor count 2,640 million 2,200 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 79.68 51.48
Floating-point performance 2x 2,549.8 gflops
Length 295 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 5000 MHz 7000 MHz
Memory bandwidth 160.0 GB/s 96 GB/s
Shared memory -
DirectX 11.2 (11_0) 12 (12_0)
Shader Model 5.0 6.4
OpenGL 4.4 4.6
OpenCL 1.2 2.0
Vulkan N/A 1.2.131
FreeSync +
Bitcoin / BTC (SHA256) 265 Mh/s
Laptop size large
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
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