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Radeon HD 7850 vs Radeon R9 M395X

Intro

The Radeon HD 7850 features 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 is made up of 1024 Stream Processors, 64 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this specific card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
Radeon HD 7850 130 Watts
Difference: 5 Watts (4%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should in theory be just a bit superior to the Radeon HD 7850 overall. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon R9 M395X should be much (about 68%) faster with regards to anisotropic filtering than the Radeon HD 7850. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 37504 (68%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7850 is the winner, but only just. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon R9 M395X 23136 Mpixels/sec
Difference: 4384 (19%)

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

Check prices at:

Radeon R9 M395X

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 M395X
Manufacturer AMD AMD
Year March 2012 2015
Code Name Pitcairn Pro Tonga
Memory 2048 MB 4096 MB
Core Speed 860 MHz 723 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 130 watts 125 watts
Bandwidth 153600 MB/sec 160000 MB/sec
Texel Rate 55040 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 23136 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 (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7850

Amazon.com

Check prices at:

Radeon R9 M395X

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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