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Radeon HD 5670 vs Radeon HD 5770

Intro

The Radeon HD 5670 uses a 40 nm design. AMD has clocked the core speed at 775 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular card. It features 400(80x5) SPUs along with 20 TAUs and 8 ROPs.

Compare those specifications to the Radeon HD 5770, which features GPU core 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) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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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

Theoretically speaking, the Radeon HD 5770 will be 20% faster than the Radeon HD 5670 in general, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 5770 will be quite a bit (approximately 119%) faster with regards to 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 superior to the Radeon HD 5670, by a large margin. (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

Radeon HD 5670

Radeon HD 5770

Specifications

Display Specifications

Hide Specifications

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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at 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 that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Radeon HD 5670

Radeon HD 5770

Comments

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

5770 FTW!

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