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GeForce GTX 560 Ti 448 vs Radeon HD 3870 X2 512MB

Intro

The GeForce GTX 560 Ti 448 uses a 40 nm design. nVidia has clocked the core speed at 732 MHz. The GDDR5 RAM works at a frequency of 900 MHz on this particular model. It features 448 SPUs along with 56 TAUs and 40 ROPs.

Compare all of that to the Radeon HD 3870 X2 512MB, which uses a 55 nm design. AMD has set the core frequency at 825 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this specific model. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should perform much faster than the Radeon HD 3870 X2 512MB in general. (explain)

GeForce GTX 560 Ti 448 144000 MB/sec
Radeon HD 3870 X2 512MB 115200 MB/sec
Difference: 28800 (25%)

Texel Rate

The GeForce GTX 560 Ti 448 should be much (more or less 55%) faster with regards to texture filtering than the Radeon HD 3870 X2 512MB. (explain)

GeForce GTX 560 Ti 448 40992 Mtexels/sec
Radeon HD 3870 X2 512MB 26400 Mtexels/sec
Difference: 14592 (55%)

Pixel Rate

The GeForce GTX 560 Ti 448 is just a bit (about 11%) faster with regards to anti-aliasing than the Radeon HD 3870 X2 512MB, and also capable of handling higher screen resolutions better. (explain)

GeForce GTX 560 Ti 448 29280 Mpixels/sec
Radeon HD 3870 X2 512MB 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 512MB

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 512MB
Manufacturer nVidia AMD
Year December 2011 Jan 28, 2008
Code Name GF110 R680
Memory 1280 MB 512 MB (x2)
Core Speed 732 MHz 825 MHz (x2)
Memory Speed 3600 MHz 1800 MHz (x2)
Power (Max TDP) 210 watts (Unknown) watts
Bandwidth 144000 MB/sec 115200 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 GDDR3
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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 560 Ti 448

Amazon.com

Check prices at:

Radeon HD 3870 X2 512MB

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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