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

Intro

The GeForce GTX 560 Ti 448 comes with a GPU clock speed of 732 MHz, and the 1280 MB of GDDR5 RAM is set to run at 900 MHz through a 320-bit bus. It also is made up of 448 Stream Processors, 56 Texture Address Units, and 40 ROPs.

Compare all of that to the Radeon HD 3870 X2 512MB, which has GPU clock speed of 825 MHz, and 512 MB of GDDR3 RAM set to run at 900 MHz through a 256-bit bus. It also features 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 Ti 448 will be 25% quicker than the Radeon HD 3870 X2 512MB in general, because of its greater 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 should be 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

The GeForce GTX 560 Ti 448 should be a bit (about 11%) more effective at full screen anti-aliasing than the Radeon HD 3870 X2 512MB, and capable of handling higher screen resolutions without losing too much performance. (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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must 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 per second. This is worked out by multiplying the total texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max 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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