Geforce GTX 670 vs Radeon HD 5870

Intro

Compare all of that to the Radeon HD 5870, which has clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670		170 Watts
Radeon HD 5870		188 Watts
	Difference: 18 Watts (11%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should theoretically be quite a bit better than the Radeon HD 5870 in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 5870		153600 MB/sec
	Difference: 38400 (25%)

Texel Rate

The Geforce GTX 670 should be much (about 51%) better at AF than the Radeon HD 5870. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 5870		68000 Mtexels/sec
	Difference: 34480 (51%)

Pixel Rate

The Geforce GTX 670 is just a bit (about 8%) more effective at AA than the Radeon HD 5870, and able to handle higher resolutions more effectively. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 5870		27200 Mpixels/sec
	Difference: 2080 (8%)

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

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 most pixels the video card could possibly record to the local memory per 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.