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GeForce GTX 260 vs Radeon HD 4870 X2

Intro

The GeForce GTX 260 has core clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 192 SPUs as well as 64 TAUs and 28 Rasterization Operator Units.

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

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 182 Watts
Radeon HD 4870 X2 350 Watts
Difference: 168 Watts (92%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should in theory be much superior to the GeForce GTX 260 overall. (explain)

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

Texel Rate

The Radeon HD 4870 X2 should be a lot (about 63%) better at anisotropic filtering than the GeForce GTX 260. (explain)

Radeon HD 4870 X2 60000 Mtexels/sec
GeForce GTX 260 36864 Mtexels/sec
Difference: 23136 (63%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4870 X2 is superior to the GeForce GTX 260, by far. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
GeForce GTX 260 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

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.

Specifications

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Model GeForce GTX 260 Radeon HD 4870 X2
Manufacturer nVidia AMD
Year June 16, 2008 Aug 12, 2008
Code Name G200 R700
Memory 896 MB 1024 MB (x2)
Core Speed 576 MHz 750 MHz (x2)
Memory Speed 1998 MHz 3600 MHz (x2)
Power (Max TDP) 182 watts 350 watts
Bandwidth 111888 MB/sec 230400 MB/sec
Texel Rate 36864 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 192 800(160x5) (x2)
Texture Mapping Units 64 40 (x2)
Render Output Units 28 16 (x2)
Bus Type GDDR3 GDDR5
Bus Width 448-bit 256-bit (x2)
Fab Process 65 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 largest amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be processed in one second. This 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 card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 260

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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