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GeForce GTX 560 Ti vs Radeon HD 4870 2GB

Intro

The GeForce GTX 560 Ti features core clock speeds of 822 MHz on the GPU, and 1002 MHz on the 1024 MB of GDDR5 RAM. It features 384 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Compare that to the Radeon HD 4870 2GB, which has core clock speeds of 750 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
GeForce GTX 560 Ti 170 Watts
Difference: 20 Watts (13%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti should be 11% quicker than the Radeon HD 4870 2GB in general, due to its greater bandwidth. (explain)

GeForce GTX 560 Ti 128256 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 13056 (11%)

Texel Rate

The GeForce GTX 560 Ti should be a lot (more or less 75%) faster with regards to texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 560 Ti 52608 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 22608 (75%)

Pixel Rate

The GeForce GTX 560 Ti should be a lot (about 119%) faster with regards to anti-aliasing than the Radeon HD 4870 2GB, and will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 560 Ti 26304 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 14304 (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

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GeForce GTX 560 Ti

Amazon.com

Radeon HD 4870 2GB

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 4870 2GB
Manufacturer nVidia AMD
Year January 2011 Jun 25, 2008
Code Name GF114 RV770 XT
Memory 1024 MB 2048 MB
Core Speed 822 MHz 750 MHz
Memory Speed 4008 MHz 3600 MHz
Power (Max TDP) 170 watts 150 watts
Bandwidth 128256 MB/sec 115200 MB/sec
Texel Rate 52608 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 26304 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 384 800(160x5)
Texture Mapping Units 64 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1950 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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