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Radeon HD 4870 X2 vs Radeon R7 260X

Intro

The Radeon HD 4870 X2 makes use of a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory runs at a speed of 900 MHz on this model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare those specifications to the Radeon R7 260X, which features core clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X 115 Watts
Radeon HD 4870 X2 350 Watts
Difference: 235 Watts (204%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 should be much faster than the Radeon R7 260X in general. (explain)

Radeon HD 4870 X2 230400 MB/sec
Radeon R7 260X 104000 MB/sec
Difference: 126400 (122%)

Texel Rate

The Radeon R7 260X will be a bit (approximately 3%) more effective at texture filtering than the Radeon HD 4870 X2. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 1600 (3%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 4870 X2 is superior to the Radeon R7 260X, and very much so. (explain)

Radeon HD 4870 X2 24000 Mpixels/sec
Radeon R7 260X 17600 Mpixels/sec
Difference: 6400 (36%)

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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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon R7 260X

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 Radeon HD 4870 X2 Radeon R7 260X
Manufacturer AMD AMD
Year Aug 12, 2008 October 2013
Code Name R700 Bonaire XTX
Memory 1024 MB (x2) 2048 MB
Core Speed 750 MHz (x2) 1100 MHz
Memory Speed 3600 MHz (x2) 6500 MHz
Power (Max TDP) 350 watts 115 watts
Bandwidth 230400 MB/sec 104000 MB/sec
Texel Rate 60000 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 800(160x5) (x2) 896
Texture Mapping Units 40 (x2) 56
Render Output Units 16 (x2) 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 2080 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card 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 the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon R7 260X

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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