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Radeon HD 4850 X2 512MB vs Radeon R7 260X

Intro

The Radeon HD 4850 X2 512MB comes with a GPU core speed of 625 MHz, and the 512 MB of GDDR3 memory runs at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon R7 260X, which comes with GPU core speed of 1100 MHz, and 2048 MB of GDDR5 memory set to run at 1625 MHz through a 128-bit bus. It also is comprised of 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X 115 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 135 Watts (117%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 512MB will be 22% quicker than the Radeon R7 260X in general, due to its greater bandwidth. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
Radeon R7 260X 104000 MB/sec
Difference: 23104 (22%)

Texel Rate

The Radeon R7 260X will be quite a bit (approximately 23%) better at AF than the Radeon HD 4850 X2 512MB. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Difference: 11600 (23%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 X2 512MB is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Radeon R7 260X 17600 Mpixels/sec
Difference: 2400 (14%)

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 4850 X2 512MB

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 4850 X2 512MB Radeon R7 260X
Manufacturer AMD AMD
Year Nov 7, 2008 October 2013
Code Name R700 Bonaire XTX
Memory 512 MB (x2) 2048 MB
Core Speed 625 MHz (x2) 1100 MHz
Memory Speed 1986 MHz (x2) 6500 MHz
Power (Max TDP) 250 watts 115 watts
Bandwidth 127104 MB/sec 104000 MB/sec
Texel Rate 50000 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 20000 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 GDDR3 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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once 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 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 calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling 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 card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 4850 X2 512MB

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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