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

Intro

The GeForce GTX 560 Ti 448 has a GPU clock speed of 732 MHz, and the 1280 MB of GDDR5 RAM runs at 900 MHz through a 320-bit bus. It also is comprised of 448 Stream Processors, 56 Texture Address Units, and 40 Raster Operation Units.

Compare those specs to the Radeon HD 3870 X2 512MB, which comes with a core clock frequency of 825 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti 448 will be 25% faster than the Radeon HD 3870 X2 512MB overall, due to its higher bandwidth. (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 is a lot (more or less 55%) faster with regards to AF 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

If using a high screen resolution is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon HD 3870 X2 512MB, but only just. (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

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.

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 (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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