GeForce GTX 660 vs Geforce GTX 670

Intro

Compare that to the Geforce GTX 670, which comes with a core clock frequency of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1344 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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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
GeForce GTX 660		5063 points
	Difference: 2288 (45%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Geforce GTX 670		170 Watts
	Difference: 30 Watts (21%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 670 should perform a lot faster than the GeForce GTX 660 in general. (explain)

Geforce GTX 670		192000 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 47808 (33%)

Texel Rate

The Geforce GTX 670 is quite a bit (more or less 31%) faster with regards to anisotropic filtering than the GeForce GTX 660. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 24080 (31%)

Pixel Rate

The Geforce GTX 670 should be much (approximately 24%) better at full screen anti-aliasing than the GeForce GTX 660, and able to handle higher resolutions while still performing well. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 5760 (24%)

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: Memory bandwidth is the maximum amount of data (counted in 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 its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.