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GeForce GTX 560 Ti 448 vs Radeon HD 3870 X2 1GB

Intro

The GeForce GTX 560 Ti 448 comes with core speeds of 732 MHz on the GPU, and 900 MHz on the 1280 MB of GDDR5 memory. It features 448 SPUs as well as 56 Texture Address Units and 40 ROPs.

Compare those specifications to the Radeon HD 3870 X2 1GB, which features a core clock speed of 825 MHz and a GDDR4 memory speed of 1126 MHz. It also makes use of a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 X2 1GB will be 0% faster than the GeForce GTX 560 Ti 448 in general, due to its greater bandwidth. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
GeForce GTX 560 Ti 448 144000 MB/sec
Difference: 128 (0%)

Texel Rate

The GeForce GTX 560 Ti 448 will be much (more or less 55%) more effective at AF than the Radeon HD 3870 X2 1GB. (explain)

GeForce GTX 560 Ti 448 40992 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 14592 (55%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 560 Ti 448 is the winner, not by a very large margin though. (explain)

GeForce GTX 560 Ti 448 29280 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 2880 (11%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 560 Ti 448

Amazon.com

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Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

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 448 Radeon HD 3870 X2 1GB
Manufacturer nVidia AMD
Year December 2011 Jan 28, 2008
Code Name GF110 R680
Memory 1280 MB 1024 MB (x2)
Core Speed 732 MHz 825 MHz (x2)
Memory Speed 3600 MHz 2252 MHz (x2)
Power (Max TDP) 210 watts (Unknown) watts
Bandwidth 144000 MB/sec 144128 MB/sec
Texel Rate 40992 Mtexels/sec 26400 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 26400 Mpixels/sec
Unified Shaders 448 320(64x5) (x2)
Texture Mapping Units 56 16 (x2)
Render Output Units 40 16 (x2)
Bus Type GDDR5 GDDR4
Bus Width 320-bit 256-bit (x2)
Fab Process 40 nm 55 nm
Transistors 3000 million (Unknown) million
Bus PCIe 2.0 x16 PCIe 2.0 x16/(internal PCIe 1.1 x16)
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.2 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has 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 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 number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 560 Ti 448

Amazon.com

Check prices at:

Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

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.

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