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Radeon HD 7950 3GB vs Radeon R9 M295X

Intro

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

Compare that to the Radeon R9 M295X, which comes with core speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs 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

Theoretically speaking, the Radeon HD 7950 3GB should perform a lot faster than the Radeon R9 M295X overall. (explain)

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

Texel Rate

The Radeon R9 M295X is just a bit (about 7%) more effective at texture filtering 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

The Radeon HD 7950 3GB will be a little bit (approximately 7%) better at AA than the Radeon R9 M295X, and also will be able to handle higher screen resolutions without slowing down too much. (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 max amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially 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 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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