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Geforce GTX 680 vs Radeon R9 M395X

Intro

The Geforce GTX 680 features a GPU core speed of 1006 MHz, and the 2048 MB of GDDR5 RAM runs at 1502 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
Geforce GTX 680 195 Watts
Difference: 70 Watts (56%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should be 20% faster than the Radeon R9 M395X in general, due to its greater data rate. (explain)

Geforce GTX 680 192256 MB/sec
Radeon R9 M395X 160000 MB/sec
Difference: 32256 (20%)

Texel Rate

The Geforce GTX 680 should be a lot (more or less 39%) more effective at texture filtering than the Radeon R9 M395X. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon R9 M395X 92544 Mtexels/sec
Difference: 36224 (39%)

Pixel Rate

If running with a high resolution is important to you, then the Geforce GTX 680 is superior to the Radeon R9 M395X, and very much so. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon R9 M395X 23136 Mpixels/sec
Difference: 9056 (39%)

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 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 Geforce GTX 680 Radeon R9 M395X
Manufacturer nVidia AMD
Year March 2012 2015
Code Name GK104 Tonga
Memory 2048 MB 4096 MB
Core Speed 1006 MHz 723 MHz
Memory Speed 6008 MHz 5000 MHz
Power (Max TDP) 195 watts 125 watts
Bandwidth 192256 MB/sec 160000 MB/sec
Texel Rate 128768 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 23136 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 12
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Geforce GTX 680

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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