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Radeon HD 4550 512MB vs Radeon HD 7770

Intro

The Radeon HD 4550 512MB comes with a GPU core clock speed of 600 MHz, and the 512 MB of GDDR3 memory runs at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare all that to the Radeon HD 7770, which comes with core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB 25 Watts
Radeon HD 7770 80 Watts
Difference: 55 Watts (220%)

Memory Bandwidth

The Radeon HD 7770, in theory, should be a lot faster than the Radeon HD 4550 512MB overall. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 4550 512MB 12800 MB/sec
Difference: 59200 (463%)

Texel Rate

The Radeon HD 7770 will be a lot (more or less 733%) more effective at anisotropic filtering than the Radeon HD 4550 512MB. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 4550 512MB 4800 Mtexels/sec
Difference: 35200 (733%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7770 is superior to the Radeon HD 4550 512MB, by a large margin. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon HD 4550 512MB 2400 Mpixels/sec
Difference: 13600 (567%)

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 7770

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 7770
Manufacturer AMD AMD
Year Sep 30, 2008 February 2012
Code Name RV710 Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 600 MHz 1000 MHz
Memory Speed 1600 MHz 4500 MHz
Power (Max TDP) 25 watts 80 watts
Bandwidth 12800 MB/sec 72000 MB/sec
Texel Rate 4800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 2400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 80(16x5) 640
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type GDDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 242 million 1500 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

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

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

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

Display Prices

Hide Prices

Radeon HD 4550 512MB

Amazon.com

Check prices at:

Radeon HD 7770

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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