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GeForce GTX 560 Ti vs Radeon HD 7870

Intro

The GeForce GTX 560 Ti has a clock speed of 822 MHz and a GDDR5 memory frequency of 1002 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It features 384 SPUs, 64 TAUs, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 7870, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this specific card. It features 1280 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

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

In theory, the Radeon HD 7870 should be 20% quicker than the GeForce GTX 560 Ti overall, because of its greater data rate. (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 much (approximately 52%) better 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 running with a high resolution is important to you, then the Radeon HD 7870 is a better choice, and very much so. (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

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

Model GeForce GTX 560 Ti Radeon HD 7870
Manufacturer nVidia AMD
Year January 2011 March 2012
Code Name GF114 Pitcairn XT
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1024 MB 2048 MB
Core Speed 822 MHz 1000 MHz
Shader Speed 1645 MHz (N/A) MHz
Memory Speed 1002 MHz (4008 MHz effective) 1200 MHz (4800 MHz effective)
Unified Shaders 384 1280
Texture Mapping Units 64 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 170 watts 175 watts
Shader Model 5.0 5.0
Bandwidth 128256 MB/sec 153600 MB/sec
Texel Rate 52608 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 32000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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