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Radeon HD 4550 512MB vs Radeon HD 5450

Intro

The Radeon HD 4550 512MB features core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 80(16x5) SPUs as well as 8 TAUs and 4 ROPs.

Compare those specifications to the Radeon HD 5450, which features a core clock frequency of 650 MHz and a DDR3 memory frequency of 800 MHz. It also uses a 64-bit bus, and makes use of a 40 nm design. It is made up of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
Radeon HD 4550 512MB 25 Watts
Difference: 6 Watts (32%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 5450 is a little bit (more or less 8%) more effective at texture filtering than the Radeon HD 4550 512MB. (explain)

Radeon HD 5450 5200 Mtexels/sec
Radeon HD 4550 512MB 4800 Mtexels/sec
Difference: 400 (8%)

Pixel Rate

The Radeon HD 5450 is a little bit (more or less 8%) better at full screen anti-aliasing than the Radeon HD 4550 512MB, and should be capable of handling higher resolutions better. (explain)

Radeon HD 5450 2600 Mpixels/sec
Radeon HD 4550 512MB 2400 Mpixels/sec
Difference: 200 (8%)

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

Check prices at:

Radeon HD 5450

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 5450
Manufacturer AMD AMD
Year Sep 30, 2008 February 4, 2010
Code Name RV710 Cedar PRO
Memory 512 MB 512 MB
Core Speed 600 MHz 650 MHz
Memory Speed 1600 MHz 1600 MHz
Power (Max TDP) 25 watts 19 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4800 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 2400 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 80(16x5) 80(16x5)
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 242 million 292 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 max amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 4550 512MB

Amazon.com

Check prices at:

Radeon HD 5450

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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