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Geforce GTX 680 vs Radeon HD 7870 XT

Intro

The Geforce GTX 680 uses a 28 nm design. nVidia has clocked the core speed at 1006 MHz. The GDDR5 memory is set to run at a frequency of 1502 MHz on this specific model. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 7870 XT, which features clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 96 TAUs and 32 Rasterization Operator Units.

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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 is 0% faster than the Radeon HD 7870 XT overall, because of its greater data rate. (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 much (about 45%) faster with regards to anisotropic 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

The Geforce GTX 680 is a small bit (more or less 9%) more effective at anti-aliasing than the Radeon HD 7870 XT, and will be able to handle higher resolutions better. (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 data (in units of MB per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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

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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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