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Geforce GTX 680 vs Radeon R9 M295X

Intro

The Geforce GTX 680 comes with core clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Compare all that to the Radeon R9 M295X, which comes with a core clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

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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

In theory, the Geforce GTX 680 should be 9% faster than the Radeon R9 M295X overall, because of its higher data rate. (explain)

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

Texel Rate

The Geforce GTX 680 should be quite a bit (more or less 34%) faster with regards to anisotropic filtering than the Radeon R9 M295X. (explain)

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

Pixel Rate

The Geforce GTX 680 will be quite a bit (more or less 34%) better at FSAA than the Radeon R9 M295X, and also should be capable of handling higher screen resolutions without losing too much performance. (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

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 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 max amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

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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