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Geforce GTX 680 vs Radeon HD 7870 XT

Intro

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

Compare all of that to the Radeon HD 7870 XT, which comes with core 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 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

Theoretically speaking, the Geforce GTX 680 should be 0% faster than the Radeon HD 7870 XT in general, due to 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 is much (approximately 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

If using high levels of AA is important to you, then the Geforce GTX 680 is superior to the Radeon HD 7870 XT, not by a very large margin though. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach 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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