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Radeon HD 7850 vs Radeon R9 380X

Intro

The Radeon HD 7850 uses a 28 nm design. AMD has set the core frequency at 860 MHz. The GDDR5 RAM runs at a speed of 1200 MHz on this particular model. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

Compare that to the Radeon R9 380X, which features a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 Texture Address Units, 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 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 be a small 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 much (about 126%) more effective at 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 a small bit (more or less 13%) more effective at anti-aliasing than the Radeon HD 7850, and should be able to handle higher screen 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 (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum 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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