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Radeon HD 7950 vs Radeon R9 Nano

Intro

The Radeon HD 7950 features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 Nano, which comes with a core clock speed of 1000 MHz and a HBM memory frequency of 500 MHz. It also makes use of a 4096-bit memory bus, and makes use of a 28 nm design. It is made up of 4096 SPUs, 256 TAUs, and 64 Raster Operation 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.

3DMark Fire Strike Graphics Score

Radeon R9 Nano 14918 points
Radeon HD 7950 7731 points
Difference: 7187 (93%)

Zcash Mining Hash Rate

Radeon R9 Nano 402 Sol/s
Radeon HD 7950 235 Sol/s
Difference: 167 (71%)

Ethereum Mining Hash Rate

Radeon R9 Nano 30 Mh/s
Radeon HD 7950 21 Mh/s
Difference: 9 (43%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 Nano 175 Watts
Radeon HD 7950 200 Watts
Difference: 25 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 Nano should be 113% faster than the Radeon HD 7950 in general, because of its greater data rate. (explain)

Radeon R9 Nano 512000 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 272000 (113%)

Texel Rate

The Radeon R9 Nano should be quite a bit (more or less 186%) better at texture filtering than the Radeon HD 7950. (explain)

Radeon R9 Nano 256000 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 166400 (186%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 Nano is the winner, and very much so. (explain)

Radeon R9 Nano 64000 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 38400 (150%)

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

Amazon.com

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Radeon R9 Nano

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 Radeon R9 Nano
Manufacturer AMD AMD
Year January 2012 September 2015
Code Name Tahiti Pro Fiji XT
Memory 1536 MB 4096 MB
Core Speed 800 MHz 1000 MHz
Memory Speed 5000 MHz 500 MHz
Power (Max TDP) 200 watts 175 watts
Bandwidth 240000 MB/sec 512000 MB/sec
Texel Rate 89600 Mtexels/sec 256000 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 1792 4096
Texture Mapping Units 112 256
Render Output Units 32 64
Bus Type GDDR5 HBM
Bus Width 384-bit 4096-bit
Fab Process 28 nm 28 nm
Transistors 4313 million 8900 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12.0
OpenGL Version OpenGL 4.2 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core 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 fill rate also depends on quite a few other factors, especially 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 7950

Amazon.com

Check prices at:

Radeon R9 Nano

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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