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Radeon HD 5770 vs Radeon HD 7850


The Radeon HD 5770 features clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Compare that to the Radeon HD 7850, which comes with a core clock speed of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
Radeon HD 7850 130 Watts
Difference: 22 Watts (20%)

Memory Bandwidth

The Radeon HD 7850 should theoretically perform a lot faster than the Radeon HD 5770 in general. (explain)

Radeon HD 7850 153600 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 76800 (100%)

Texel Rate

The Radeon HD 7850 will be quite a bit (approximately 62%) better at AF than the Radeon HD 5770. (explain)

Radeon HD 7850 55040 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 21040 (62%)

Pixel Rate

The Radeon HD 7850 is quite a bit (approximately 102%) better at anti-aliasing than the Radeon HD 5770, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 13920 (102%)

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 5770

Radeon HD 7850

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 5770 Radeon HD 7850
Manufacturer AMD AMD
Year October 13, 2009 March 2012
Code Name Juniper XT Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 850 MHz 860 MHz
Memory Speed 4800 MHz 4800 MHz
Power (Max TDP) 108 watts 130 watts
Bandwidth 76800 MB/sec 153600 MB/sec
Texel Rate 34000 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 13600 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 800(160x5) 1024
Texture Mapping Units 40 64
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 2800 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.


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