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Radeon HD 7850 vs Radeon R9 M395X

Intro

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

Compare those specifications to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core frequency at 723 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

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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

In theory, the Radeon R9 M395X should be 4% quicker than the Radeon HD 7850 in general, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 M395X should be a lot (approximately 68%) better at AF than the Radeon HD 7850. (explain)

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

Pixel Rate

The Radeon HD 7850 should be a small bit (approximately 19%) better at full screen anti-aliasing than the Radeon R9 M395X, and able to handle higher resolutions without losing too much performance. (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 data (counted in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability 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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