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Geforce GTX 680 vs Radeon R9 M265X

Intro

The Geforce GTX 680 comes with a core clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon R9 M265X, which has GPU core speed of 575 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 is 167% faster than the Radeon R9 M265X in general, due to its greater bandwidth. (explain)

Geforce GTX 680 192256 MB/sec
Radeon R9 M265X 72000 MB/sec
Difference: 120256 (167%)

Texel Rate

The Geforce GTX 680 will be a lot (approximately 460%) better at AF than the Radeon R9 M265X. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 105768 (460%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 680 is a better choice, and very much so. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 22992 (250%)

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 M265X

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 M265X
Manufacturer nVidia AMD
Year March 2012 May 1 2014
Code Name GK104 Venus Pro
Memory 2048 MB 2048 MB
Core Speed 1006 MHz 575 MHz
Memory Speed 6008 MHz 4500 MHz
Power (Max TDP) 195 watts (Unknown) watts
Bandwidth 192256 MB/sec 72000 MB/sec
Texel Rate 128768 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 1536 640
Texture Mapping Units 128 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-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: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per 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 better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - 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 M265X

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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