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Geforce GTX 680 vs Radeon R9 M295X

Intro

The Geforce GTX 680 makes use of a 28 nm design. nVidia has clocked the core frequency at 1006 MHz. The GDDR5 RAM works at a frequency of 1502 MHz on this specific model. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Geforce GTX 680 195 Watts
Difference: 70 Watts (56%)

Memory Bandwidth

Theoretically, the Geforce GTX 680 should be just a bit faster than the Radeon R9 M295X in general. (explain)

Geforce GTX 680 192256 MB/sec
Radeon R9 M295X 176000 MB/sec
Difference: 16256 (9%)

Texel Rate

The Geforce GTX 680 should be much (approximately 34%) faster with regards to texture filtering than the Radeon R9 M295X. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon R9 M295X 96000 Mtexels/sec
Difference: 32768 (34%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 680 is superior to the Radeon R9 M295X, by a large margin. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon R9 M295X 24000 Mpixels/sec
Difference: 8192 (34%)

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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Geforce GTX 680

Amazon.com

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Radeon R9 M295X

Amazon.com

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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 Geforce GTX 680 Radeon R9 M295X
Manufacturer nVidia AMD
Year March 2012 2014
Code Name GK104 Unknown
Memory 2048 MB 4096 MB
Core Speed 1006 MHz 750 MHz
Memory Speed 6008 MHz 5500 MHz
Power (Max TDP) 195 watts 125 watts
Bandwidth 192256 MB/sec 176000 MB/sec
Texel Rate 128768 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 128 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 3540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Geforce GTX 680

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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