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GeForce GTX 560 Ti vs Radeon HD 7870

Intro

The GeForce GTX 560 Ti makes use of a 40 nm design. nVidia has clocked the core frequency at 822 MHz. The GDDR5 RAM works at a speed of 1002 MHz on this particular model. It features 384 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 7870, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this specific model. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560 Ti 170 Watts
Radeon HD 7870 175 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 will be 20% quicker than the GeForce GTX 560 Ti in general, due to its greater bandwidth. (explain)

Radeon HD 7870 153600 MB/sec
GeForce GTX 560 Ti 128256 MB/sec
Difference: 25344 (20%)

Texel Rate

The Radeon HD 7870 should be a lot (more or less 52%) more effective at anisotropic filtering than the GeForce GTX 560 Ti. (explain)

Radeon HD 7870 80000 Mtexels/sec
GeForce GTX 560 Ti 52608 Mtexels/sec
Difference: 27392 (52%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7870 is a better choice, by far. (explain)

Radeon HD 7870 32000 Mpixels/sec
GeForce GTX 560 Ti 26304 Mpixels/sec
Difference: 5696 (22%)

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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GeForce GTX 560 Ti

Amazon.com

Radeon HD 7870

Amazon.com

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 GeForce GTX 560 Ti Radeon HD 7870
Manufacturer nVidia AMD
Year January 2011 March 2012
Code Name GF114 Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 822 MHz 1000 MHz
Memory Speed 4008 MHz 4800 MHz
Power (Max TDP) 170 watts 175 watts
Bandwidth 128256 MB/sec 153600 MB/sec
Texel Rate 52608 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 384 1280
Texture Mapping Units 64 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1950 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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