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Radeon HD 7850 vs Radeon R7 260X


The Radeon HD 7850 has a GPU core clock speed of 860 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1200 MHz through a 256-bit bus. It also features 1024 Stream Processors, 64 Texture Address Units, and 32 ROPs.

Compare that to the Radeon R7 260X, which comes with clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs as well as 56 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X 115 Watts
Radeon HD 7850 130 Watts
Difference: 15 Watts (13%)

Memory Bandwidth

The Radeon HD 7850, in theory, should perform a lot faster than the Radeon R7 260X overall. (explain)

Radeon HD 7850 153600 MB/sec
Radeon R7 260X 104000 MB/sec
Difference: 49600 (48%)

Texel Rate

The Radeon R7 260X is a little bit (about 12%) better at texture filtering than the Radeon HD 7850. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 6560 (12%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7850 is a better choice, by far. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon R7 260X 17600 Mpixels/sec
Difference: 9920 (56%)

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.

Price Comparison

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Radeon HD 7850

Radeon R7 260X

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.


Display Specifications

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Model Radeon HD 7850 Radeon R7 260X
Manufacturer AMD AMD
Year March 2012 October 2013
Code Name Pitcairn Pro Bonaire XTX
Memory 2048 MB 2048 MB
Core Speed 860 MHz 1100 MHz
Memory Speed 4800 MHz 6500 MHz
Power (Max TDP) 130 watts 115 watts
Bandwidth 153600 MB/sec 104000 MB/sec
Texel Rate 55040 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1024 896
Texture Mapping Units 64 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.


4 Responses to “Radeon HD 7850 vs Radeon R7 260X”
Muky says:

You were wrong with TEXEL RATE... You wrote... 7850 = 64 TMU=55040 TR and R7 260X = 56 TMU = 61600 TR.

Muky says:

My mistake... It's OK! Sorry! :)

Blair says:

Uh the 7850 has a TDP of 150Watts watts not 130Watts. That's why it is such a great overclocking GPU. You could make it perform almost even with a stock 7870 if you could get a high stable overclock.

Blair says:

(Quote:)You were wrong with TEXEL RATE... You wrote... 7850 = 64 TMU=55040 TR and R7 260X = 56 TMU = 61600 TR.

This might be true with a factory overclocked card. but Stock clock the 260X has a higher texel rate. That does not mean it is faster. You have to keep in consideration the other numbers.

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