Radeon HD 6990 vs Radeon RX 550

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

Main Specs

  Radeon HD 6990 Radeon RX 550
Power consumption (TDP) 375 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 8-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors 1x DVI, 4x mini-DisplayPort 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 6990 has 650% more power consumption, than Radeon RX 550.
  • Radeon HD 6990 is connected by PCIe 2.0 x16, and Radeon RX 550 uses PCIe 3.0 x8 interface.
  • Radeon RX 550 has 2 GB more memory, than Radeon HD 6990.
  • Both cards are used in Desktops.
  • Radeon HD 6990 is build with TeraScale 3 architecture, and Radeon RX 550 - with GCN 4.0.
  • Core clock speed of Radeon RX 550 is 270 MHz higher, than Radeon HD 6990.
  • Radeon HD 6990 is manufactured by 40 nm process technology, and Radeon RX 550 - by 14 nm process technology.
  • Radeon HD 6990 is 150 mm longer, than Radeon RX 550.
  • Memory clock speed of Radeon RX 550 is 2000 MHz higher, than Radeon HD 6990.

Game benchmarks

high / 1080p 14−16 14−16
ultra / 1080p 9−10 8−9
QHD / 1440p 3−4 3−4
low / 720p 30−35 30−33
medium / 1080p 18−20 18−20
Radeon HD 6990 and Radeon RX 550 have the same average FPS in Assassin's Creed Odyssey.

Full Specs

  Radeon HD 6990 Radeon RX 550
Architecture TeraScale 3 GCN 4.0
Code name Antilles Lexa
Type Desktop Desktop
Release date 8 March 2011 20 April 2017
Pipelines 1536 512
Core clock speed 830 MHz 1100 MHz
Boost Clock 1183 MHz
Transistor count 2,640 million 2,200 million
Manufacturing process technology 40 nm 14 nm
Texture fill rate 79.68 37.86
Floating-point performance 2x 2,549.8 gflops 1,211 gflops
Length 295 mm 145 mm
Memory bus width 256 Bit 128 Bit
Memory clock speed 5000 MHz 7000 MHz
Memory bandwidth 160.0 GB/s 112.0 GB/s
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
Bitcoin / BTC (SHA256) 265 Mh/s
Ethereum / ETH (DaggerHashimoto) 24 Mh/s
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