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Radeon HD 7950 3GB vs Radeon R9 280

Intro

The Radeon HD 7950 3GB features a GPU core clock speed of 800 MHz, and the 3072 MB of GDDR5 RAM runs at 1250 MHz through a 384-bit bus. It also features 1792 Stream Processors, 112 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon R9 280, which uses a 28 nm design. AMD has set the core speed at 933 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this specific card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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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.

Zcash Mining Hash Rate

Radeon HD 7950 3GB 229 Sol/s
Radeon R9 280 183 Sol/s
Difference: 46 (25%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB 200 Watts
Radeon R9 280 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The Radeon R9 280 will be a little bit (more or less 17%) better at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon R9 280 104496 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 14896 (17%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 280 is a better choice, but not by far. (explain)

Radeon R9 280 29856 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 4256 (17%)

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 7950 3GB

Amazon.com

Check prices at:

Radeon R9 280

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 7950 3GB Radeon R9 280
Manufacturer AMD AMD
Year January 2012 March 2014
Code Name Tahiti Pro Tahiti Pro
Memory 3072 MB 3072 MB
Core Speed 800 MHz 933 MHz
Memory Speed 5000 MHz 5000 MHz
Power (Max TDP) 200 watts 250 watts
Bandwidth 240000 MB/sec 240000 MB/sec
Texel Rate 89600 Mtexels/sec 104496 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 29856 Mpixels/sec
Unified Shaders 1792 1792
Texture Mapping Units 112 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 384-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 4313 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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7950 3GB

Amazon.com

Check prices at:

Radeon R9 280

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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