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Geforce GTX 680 vs Radeon HD 7870 XT

Intro

The Geforce GTX 680 comes with a GPU clock speed of 1006 MHz, and the 2048 MB of GDDR5 RAM runs at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon HD 7870 XT, which has core clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 680 7650 points
Radeon HD 7870 XT 6390 points
Difference: 1260 (20%)

Ethereum Mining Hash Rate

Geforce GTX 680 16 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 1 (7%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Geforce GTX 680 195 Watts
Difference: 10 Watts (5%)

Memory Bandwidth

In theory, the Geforce GTX 680 should be a little bit faster than the Radeon HD 7870 XT overall. (explain)

Geforce GTX 680 192256 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 256 (0%)

Texel Rate

The Geforce GTX 680 should be a lot (more or less 45%) faster with regards to texture filtering than the Radeon HD 7870 XT. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 39968 (45%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 680 is superior to the Radeon HD 7870 XT, but not by far. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 2592 (9%)

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 HD 7870 XT

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 HD 7870 XT
Manufacturer nVidia AMD
Year March 2012 November 2012
Code Name GK104 Tahiti LE
Memory 2048 MB 2048 MB
Core Speed 1006 MHz 925 MHz
Memory Speed 6008 MHz 6000 MHz
Power (Max TDP) 195 watts 185 watts
Bandwidth 192256 MB/sec 192000 MB/sec
Texel Rate 128768 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1536 1536
Texture Mapping Units 128 96
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Geforce GTX 680

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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