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Radeon HD 7950 3GB vs Radeon R9 M295X

Intro

The Radeon HD 7950 3GB features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory works at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 75 Watts (60%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 3GB should theoretically be quite a bit superior to the Radeon R9 M295X in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon R9 M295X 176000 MB/sec
Difference: 64000 (36%)

Texel Rate

The Radeon R9 M295X will be just a bit (about 7%) more effective at AF than the Radeon HD 7950 3GB. (explain)

Radeon R9 M295X 96000 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 6400 (7%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 3GB is superior to the Radeon R9 M295X, though not by far. (explain)

Radeon HD 7950 3GB 25600 Mpixels/sec
Radeon R9 M295X 24000 Mpixels/sec
Difference: 1600 (7%)

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 7950 3GB

Amazon.com

Check prices at:

Radeon R9 M295X

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 7950 3GB Radeon R9 M295X
Manufacturer AMD AMD
Year January 2012 2014
Code Name Tahiti Pro Unknown
Memory 3072 MB 4096 MB
Core Speed 800 MHz 750 MHz
Memory Speed 5000 MHz 5500 MHz
Power (Max TDP) 200 watts 125 watts
Bandwidth 240000 MB/sec 176000 MB/sec
Texel Rate 89600 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured 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 type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7950 3GB

Amazon.com

Check prices at:

Radeon R9 M295X

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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