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Radeon HD 7850 vs Radeon R9 380X

Intro

The Radeon HD 7850 comes with a GPU core speed of 860 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1200 MHz through a 256-bit bus. It also is made up of 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 380X, which features clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs 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.

3DMark Fire Strike Graphics Score

Radeon R9 380X 9519 points
Radeon HD 7850 5200 points
Difference: 4319 (83%)

Ethereum Mining Hash Rate

Radeon R9 380X 19 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 6 (46%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 380X 190 Watts
Difference: 60 Watts (46%)

Memory Bandwidth

The Radeon R9 380X should theoretically perform a bit faster than the Radeon HD 7850 overall. (explain)

Radeon R9 380X 182400 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 28800 (19%)

Texel Rate

The Radeon R9 380X should be quite a bit (more or less 126%) faster with regards to AF than the Radeon HD 7850. (explain)

Radeon R9 380X 124160 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 69120 (126%)

Pixel Rate

The Radeon R9 380X should be just a bit (approximately 13%) better at AA than the Radeon HD 7850, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon R9 380X 31040 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 3520 (13%)

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 380X

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 R9 380X
Manufacturer AMD AMD
Year March 2012 November 2015
Code Name Pitcairn Pro Tonga XT
Memory 2048 MB 4096 MB
Core Speed 860 MHz 970 MHz
Memory Speed 4800 MHz 5700 MHz
Power (Max TDP) 130 watts 190 watts
Bandwidth 153600 MB/sec 182400 MB/sec
Texel Rate 55040 Mtexels/sec 124160 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1024 2048
Texture Mapping Units 64 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 5000 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 data (counted in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 7850

Amazon.com

Check prices at:

Radeon R9 380X

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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