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Radeon HD 7850 vs Radeon R9 Nano

Intro

The Radeon HD 7850 has a GPU clock speed of 860 MHz, and the 2048 MB of GDDR5 memory is set to run at 1200 MHz through a 256-bit bus. It also features 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 Nano, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The HBM memory runs at a speed of 500 MHz on this card. It features 4096 SPUs along with 256 Texture Address Units and 64 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.

3DMark Fire Strike Graphics Score

Radeon R9 Nano 14918 points
Radeon HD 7850 5200 points
Difference: 9718 (187%)

Zcash Mining Hash Rate

Radeon R9 Nano 402 Sol/s
Radeon HD 7850 171 Sol/s
Difference: 231 (135%)

Ethereum Mining Hash Rate

Radeon R9 Nano 30 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 17 (131%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 Nano 175 Watts
Difference: 45 Watts (35%)

Memory Bandwidth

The Radeon R9 Nano, in theory, should perform quite a bit faster than the Radeon HD 7850 in general. (explain)

Radeon R9 Nano 512000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 358400 (233%)

Texel Rate

The Radeon R9 Nano is much (about 365%) faster with regards to texture filtering than the Radeon HD 7850. (explain)

Radeon R9 Nano 256000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 200960 (365%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 Nano is the winner, by far. (explain)

Radeon R9 Nano 64000 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 36480 (133%)

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

Amazon.com

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Radeon R9 Nano

Amazon.com

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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 7850 Radeon R9 Nano
Manufacturer AMD AMD
Year March 2012 September 2015
Code Name Pitcairn Pro Fiji XT
Memory 2048 MB 4096 MB
Core Speed 860 MHz 1000 MHz
Memory Speed 4800 MHz 500 MHz
Power (Max TDP) 130 watts 175 watts
Bandwidth 153600 MB/sec 512000 MB/sec
Texel Rate 55040 Mtexels/sec 256000 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 1024 4096
Texture Mapping Units 64 256
Render Output Units 32 64
Bus Type GDDR5 HBM
Bus Width 256-bit 4096-bit
Fab Process 28 nm 28 nm
Transistors 2800 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 (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, 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 amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 7850

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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