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Radeon HD 5670 vs Radeon HD 5770


The Radeon HD 5670 comes with a core clock speed of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It features 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

Compare that to the Radeon HD 5770, which features a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 128-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 5770 108 Watts
Difference: 47 Watts (77%)

Memory Bandwidth

The Radeon HD 5770 should in theory perform just a bit faster than the Radeon HD 5670 overall. (explain)

Radeon HD 5770 76800 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 is much (more or less 119%) more effective at AF than the Radeon HD 5670. (explain)

Radeon HD 5770 34000 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 18500 (119%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5770 is a better choice, and very much so. (explain)

Radeon HD 5770 13600 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 7400 (119%)

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 5670

Radeon HD 5770

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.


Display Specifications

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Model Radeon HD 5670 Radeon HD 5770
Manufacturer AMD AMD
Year January 14, 2010 October 13, 2009
Code Name Redwood XT Juniper XT
Memory 1024 MB 1024 MB
Core Speed 775 MHz 850 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 61 watts 108 watts
Bandwidth 64000 MB/sec 76800 MB/sec
Texel Rate 15500 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 6200 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 400(80x5) 800(160x5)
Texture Mapping Units 20 40
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 627 million 1040 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 3.2

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 bandwidth is, the lower the ability to get to the max fill rate.


5 Responses to “Radeon HD 5670 vs Radeon HD 5770”
Grant says:

5770 FTW!

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