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ATI Radeon HD 5550

ATI Radeon HD 5550 Image ATI Redwood Image
The Radeon HD 5550 was a graphics card by ATI, launched in February 2010. Built on the 40 nm process, and based on the Redwood graphics processor, in its Redwood PRO2 variant, the card supports DirectX 11.0. The Redwood graphics processor is an average sized chip with a die area of 104 mm² and 627 million transistors. Unlike the fully unlocked Radeon HD 5730, which uses the same GPU but has all 400 shaders enabled, ATI has disabled some shading units on the Radeon HD 5550 to reach the product's target shader count. It features 320 shading units, 16 texture mapping units and 8 ROPs. ATI has placed 512 MB GDDR5 memory on the card, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 550 MHz, memory is running at 800 MHz.
We recommend the ATI Radeon HD 5550 for gaming with highest details at resolutions up to, and including, 800x600.
Being a single-slot card, the ATI Radeon HD 5550 does not require any additional power connector, its power draw is rated at 39 W maximum. Display outputs include: 1x DVI, 1x HDMI, 1x VGA. Radeon HD 5550 is connected to the rest of the system using a PCIe 2.0 x16 interface. The card measures 165 mm in length, and features a single-slot cooling solution.

Graphics Processor

GPU Name: Redwood
GPU Variant: Redwood PRO2
Architecture: TeraScale 2
Process Size: 40 nm
Transistors: 627 million
Die Size: 104 mm²

Graphics Card

Released: Feb 9th, 2010
Production Status: End-of-life
Bus Interface: PCIe 2.0 x16

Clock Speeds

GPU Clock: 550 MHz
Memory Clock: 800 MHz
3200 MHz effective


Memory Size: 512 MB
Memory Type: GDDR5
Memory Bus: 128 bit
Bandwidth: 51.2 GB/s

Render Config

Shading Units: 320
TMUs: 16
ROPs: 8
Compute Units: 4
Pixel Rate: 4.40 GPixel/s
Texture Rate: 8.80 GTexel/s
Floating-point performance: 352.0 GFLOPS

Board Design

Slot Width: Single-slot
Length: 6.5 inches
165 mm
TDP: 39 W
Outputs: 1x DVI
1x VGA
Power Connectors: None
Board Number: C021, C025, C029

Graphics Features

DirectX: 11.0
OpenGL: 4.3
OpenCL: 1.2
Shader Model: 5.0


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Our review database contains 29 reviews of the Radeon HD 5550.

Card Notes

Variant Memory: 1 GB
Variant Memory: 2 GB

Retail boards based on this design

Name GPU Clock Memory Clock Other Changes
HIS HD 5550 Silence 1 GB 550 MHz 800 MHz 1024 MB, DDR2, 7.28 inches
Sapphire HD 5550 2 GB 550 MHz 400 MHz 2048 MB, 6.69 inches
Sapphire HD 5550 DP 550 MHz 1000 MHz 1x DVI 1x HDMI 1x DisplayPort
Sapphire HD 5550 HDMI 550 MHz 1000 MHz
Sapphire HD 5550 Ultimate 550 MHz 400 MHz 1024 MB, DDR2