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Geforce GTX 670 vs Radeon HD 6850

Intro

The Geforce GTX 670 makes use of a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 memory works at a speed of 1500 MHz on this model. It features 1344 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 6850, which features clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs as well as 48 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 670 7351 points
Radeon HD 6850 2395 points
Difference: 4956 (207%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Geforce GTX 670 170 Watts
Difference: 43 Watts (34%)

Memory Bandwidth

Performance-wise, the Geforce GTX 670 should in theory be much better than the Radeon HD 6850 in general. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 64000 (50%)

Texel Rate

The Geforce GTX 670 is quite a bit (about 175%) more effective at AF than the Radeon HD 6850. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 65280 (175%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 670 is a better choice, though not by far. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 4480 (18%)

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 6850

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 6850
Manufacturer nVidia AMD
Year May 2012 October 2010
Code Name GK104 Barts Pro
Memory 2048 MB 1024 MB
Core Speed 915 MHz 775 MHz
Memory Speed 6000 MHz 4000 MHz
Power (Max TDP) 170 watts 127 watts
Bandwidth 192000 MB/sec 128000 MB/sec
Texel Rate 102480 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 1344 960
Texture Mapping Units 112 48
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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the 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 maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Geforce GTX 670

Amazon.com

Check prices at:

Radeon HD 6850

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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