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Radeon HD 4550 512MB vs Radeon HD 5550

Intro

The Radeon HD 4550 512MB has clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 80(16x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare all of that to the Radeon HD 5550, which has a core clock speed of 550 MHz and a DDR2 memory speed of 400 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 320(64x5) SPUs, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The Radeon HD 5550 should be a lot (more or less 83%) better at anisotropic filtering than the Radeon HD 4550 512MB. (explain)

Radeon HD 5550 8800 Mtexels/sec
Radeon HD 4550 512MB 4800 Mtexels/sec
Difference: 4000 (83%)

Pixel Rate

The Radeon HD 5550 should be quite a bit (about 83%) more effective at AA than the Radeon HD 4550 512MB, and should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5550 4400 Mpixels/sec
Radeon HD 4550 512MB 2400 Mpixels/sec
Difference: 2000 (83%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 4550 512MB

Amazon.com

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Radeon HD 5550

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 4550 512MB Radeon HD 5550
Manufacturer AMD AMD
Year Sep 30, 2008 February 9, 2010
Code Name RV710 Redwood LE
Memory 512 MB 512 MB
Core Speed 600 MHz 550 MHz
Memory Speed 1600 MHz 800 MHz
Power (Max TDP) 25 watts (Unknown) watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4800 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 2400 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 80(16x5) 320(64x5)
Texture Mapping Units 8 16
Render Output Units 4 8
Bus Type GDDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 55 nm 40 nm
Transistors 242 million 627 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 4550 512MB

Amazon.com

Check prices at:

Radeon HD 5550

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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