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Radeon HD 6850 vs Radeon R9 280X

Intro

The Radeon HD 6850 features a GPU core speed of 775 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 256-bit bus. It also is made up of 960 SPUs, 48 TAUs, and 32 ROPs.

Compare all that to the Radeon R9 280X, which comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 280X 8886 points
Radeon HD 6850 2395 points
Difference: 6491 (271%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon R9 280X 250 Watts
Difference: 123 Watts (97%)

Memory Bandwidth

Performance-wise, the Radeon R9 280X should theoretically be quite a bit superior to the Radeon HD 6850 in general. (explain)

Radeon R9 280X 288000 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 160000 (125%)

Texel Rate

The Radeon R9 280X is much (approximately 192%) faster with regards to anisotropic filtering than the Radeon HD 6850. (explain)

Radeon R9 280X 108800 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 71600 (192%)

Pixel Rate

The Radeon R9 280X will be a bit (approximately 10%) better at AA than the Radeon HD 6850, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 280X 27200 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 2400 (10%)

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 6850

Amazon.com

Check prices at:

Radeon R9 280X

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 6850 Radeon R9 280X
Manufacturer AMD AMD
Year October 2010 October 2013
Code Name Barts Pro Tahiti XTL
Memory 1024 MB 3072 MB
Core Speed 775 MHz 850 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 127 watts 250 watts
Bandwidth 128000 MB/sec 288000 MB/sec
Texel Rate 37200 Mtexels/sec 108800 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 960 2048
Texture Mapping Units 48 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 1700 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 6850

Amazon.com

Check prices at:

Radeon R9 280X

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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