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GeForce GTX 260 216SP 55 nm vs Radeon HD 4870 X2

Intro

The GeForce GTX 260 216SP 55 nm comes with a clock speed of 576 MHz and a GDDR3 memory speed of 999 MHz. It also makes use of a 448-bit bus, and makes use of a 55 nm design. It is comprised of 216 SPUs, 72 Texture Address Units, and 28 Raster Operation Units.

Compare those specifications to the Radeon HD 4870 X2, which makes use of a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM runs at a frequency of 900 MHz on this card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 216SP 55 nm 171 Watts
Radeon HD 4870 X2 350 Watts
Difference: 179 Watts (105%)

Memory Bandwidth

In theory, the Radeon HD 4870 X2 is 106% quicker than the GeForce GTX 260 216SP 55 nm in general, due to its higher data rate. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GTX 260 216SP 55 nm 111888 MB/sec
Difference: 118512 (106%)

Texel Rate

The Radeon HD 4870 X2 is a lot (about 45%) better at AF than the GeForce GTX 260 216SP 55 nm. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GTX 260 216SP 55 nm 41472 Mtexels/sec
Difference: 18528 (45%)

Pixel Rate

The Radeon HD 4870 X2 will be much (about 49%) faster with regards to anti-aliasing than the GeForce GTX 260 216SP 55 nm, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
GeForce GTX 260 216SP 55 nm 16128 Mpixels/sec
Difference: 7872 (49%)

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 260 216SP 55 nm

Amazon.com

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Radeon HD 4870 X2

Amazon.com

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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 260 216SP 55 nm Radeon HD 4870 X2
Manufacturer nVidia AMD
Year December 22, 2008 Aug 12, 2008
Code Name G200b R700
Memory 896 MB 1024 MB (x2)
Core Speed 576 MHz 750 MHz (x2)
Memory Speed 1998 MHz 3600 MHz (x2)
Power (Max TDP) 171 watts 350 watts
Bandwidth 111888 MB/sec 230400 MB/sec
Texel Rate 41472 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 216 800(160x5) (x2)
Texture Mapping Units 72 40 (x2)
Render Output Units 28 16 (x2)
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit (x2)
Fab Process 55 nm 55 nm
Transistors 1400 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 260 216SP 55 nm

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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