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Radeon HD 4550 256MB vs Radeon HD 5550

Intro

The Radeon HD 4550 256MB uses a 55 nm design. AMD has clocked the core frequency at 600 MHz. The DDR3 memory is set to run at a frequency of 800 MHz on this model. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Compare all of that to the Radeon HD 5550, which has core speeds of 550 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 RAM. It features 320(64x5) SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

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

Texel Rate

The Radeon HD 5550 is quite a bit (about 83%) better at anisotropic filtering than the Radeon HD 4550 256MB. (explain)

Radeon HD 5550 8800 Mtexels/sec
Radeon HD 4550 256MB 4800 Mtexels/sec
Difference: 4000 (83%)

Pixel Rate

The Radeon HD 5550 is much (about 83%) more effective at FSAA than the Radeon HD 4550 256MB, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 5550 4400 Mpixels/sec
Radeon HD 4550 256MB 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 256MB

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.

Specifications

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Model Radeon HD 4550 256MB Radeon HD 5550
Manufacturer AMD AMD
Year Sep 30, 2008 February 9, 2010
Code Name RV710 Redwood LE
Memory 256 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 DDR3 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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4550 256MB

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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