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Radeon HD 7850 vs Radeon RX 580

Intro

The Radeon HD 7850 uses a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this card. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

Compare all of that to the Radeon RX 580, which has a GPU core clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM running at 2000 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 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 RX 580 13630 points
Radeon HD 7850 5200 points
Difference: 8430 (162%)

Zcash Mining Hash Rate

Radeon RX 580 315 Sol/s
Radeon HD 7850 171 Sol/s
Difference: 144 (84%)

Ethereum Mining Hash Rate

Radeon RX 580 28 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 15 (115%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon RX 580 185 Watts
Difference: 55 Watts (42%)

Memory Bandwidth

The Radeon RX 580 should in theory be a lot faster than the Radeon HD 7850 overall. (explain)

Radeon RX 580 262144 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 108544 (71%)

Texel Rate

The Radeon RX 580 should be a lot (more or less 229%) more effective at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon RX 580 181008 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 125968 (229%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 580 is the winner, and very much so. (explain)

Radeon RX 580 40224 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 12704 (46%)

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 RX 580

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 7850 Radeon RX 580
Manufacturer AMD AMD
Year March 2012 April 2017
Code Name Pitcairn Pro Polaris 20
Memory 2048 MB 8192 MB
Core Speed 860 MHz 1257 MHz
Memory Speed 4800 MHz 8000 MHz
Power (Max TDP) 130 watts 185 watts
Bandwidth 153600 MB/sec 262144 MB/sec
Texel Rate 55040 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 1024 2304
Texture Mapping Units 64 144
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 14 nm
Transistors 2800 million 5700 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 max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 7850

Amazon.com

Check prices at:

Radeon RX 580

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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