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Geforce GTX 670 vs Radeon HD 7870

Intro

The Geforce GTX 670 comes with core clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1344 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 7870, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 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 670 7351 points
Radeon HD 7870 6230 points
Difference: 1121 (18%)

Ethereum Mining Hash Rate

Radeon HD 7870 16 Mh/s
Geforce GTX 670 13 Mh/s
Difference: 3 (23%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Radeon HD 7870 175 Watts
Difference: 5 Watts (3%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should theoretically be quite a bit better than the Radeon HD 7870 overall. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 7870 153600 MB/sec
Difference: 38400 (25%)

Texel Rate

The Geforce GTX 670 will be much (approximately 28%) faster with regards to AF than the Radeon HD 7870. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 7870 80000 Mtexels/sec
Difference: 22480 (28%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7870 is the winner, though only just barely. (explain)

Radeon HD 7870 32000 Mpixels/sec
Geforce GTX 670 29280 Mpixels/sec
Difference: 2720 (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 670

Amazon.com

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Radeon HD 7870

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 670 Radeon HD 7870
Manufacturer nVidia AMD
Year May 2012 March 2012
Code Name GK104 Pitcairn XT
Memory 2048 MB 2048 MB
Core Speed 915 MHz 1000 MHz
Memory Speed 6000 MHz 4800 MHz
Power (Max TDP) 170 watts 175 watts
Bandwidth 192000 MB/sec 153600 MB/sec
Texel Rate 102480 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 1344 1280
Texture Mapping Units 112 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 7870

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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