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Geforce GTX 670 vs Radeon HD 6870


Intro

The Geforce GTX 670 comes with a core clock speed of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 6870, which comes with clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 1120 SPUs along with 56 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 7424 points
Radeon HD 6870 2870 points
Difference: 4554 (159%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
Geforce GTX 670 170 Watts
Difference: 19 Watts (13%)

Memory Bandwidth

Theoretically, the Geforce GTX 670 should be much faster than the Radeon HD 6870 in general. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 57600 (43%)

Texel Rate

The Geforce GTX 670 is a lot (about 103%) faster with regards to texture filtering than the Radeon HD 6870. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 52080 (103%)

Pixel Rate

The Geforce GTX 670 will be a bit (approximately 2%) better at full screen anti-aliasing than the Radeon HD 6870, and should be capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 6870 28800 Mpixels/sec
Difference: 480 (2%)

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

Radeon HD 6870

Amazon.com

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 6870
Manufacturer nVidia AMD
Year May 2012 October 2010
Code Name GK104 Barts XT
Memory 2048 MB 1024 MB
Core Speed 915 MHz 900 MHz
Memory Speed 6000 MHz 4200 MHz
Power (Max TDP) 170 watts 151 watts
Bandwidth 192000 MB/sec 134400 MB/sec
Texel Rate 102480 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 1344 1120
Texture Mapping Units 112 56
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 3540 million 1700 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Radeon HD 6870

Amazon.com

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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