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GeForce GTX 560 Ti vs Radeon HD 7870

Intro

The GeForce GTX 560 Ti features a GPU core clock speed of 822 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1002 MHz through a 256-bit bus. It also is made up of 384 SPUs, 64 Texture Address Units, and 32 ROPs.

Compare that to the Radeon HD 7870, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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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

The Radeon HD 7870 should theoretically perform a small bit faster than the GeForce GTX 560 Ti in general. (explain)

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

Texel Rate

The Radeon HD 7870 will be much (more or less 52%) faster with regards to texture 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

The Radeon HD 7870 will be a lot (about 22%) faster with regards to FSAA than the GeForce GTX 560 Ti, and should be capable of handling higher resolutions without slowing down too much. (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 largest amount of data (counted in megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 get to the maximum fill rate.

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