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Geforce GTX 680 vs Radeon R9 M390X

Intro

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

Compare those specs to the Radeon R9 M390X, which features a clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
Geforce GTX 680 195 Watts
Difference: 70 Watts (56%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should perform a little bit faster than the Radeon R9 M390X overall. (explain)

Geforce GTX 680 192256 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 32256 (20%)

Texel Rate

The Geforce GTX 680 should be quite a bit (approximately 39%) better at anisotropic filtering than the Radeon R9 M390X. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 36224 (39%)

Pixel Rate

The Geforce GTX 680 is a lot (more or less 39%) more effective at anti-aliasing than the Radeon R9 M390X, and also capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon R9 M390X 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

Check prices at:

Radeon R9 M390X

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 M390X
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 largest amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Geforce GTX 680

Amazon.com

Check prices at:

Radeon R9 M390X

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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