GeForce GTX 660 vs GeForce GTX 780 Ti

Intro

Compare all of that to the GeForce GTX 780 Ti, which has GPU core speed of 875 MHz, and 3072 MB of GDDR5 RAM running at 1750 MHz through a 384-bit bus. It also is comprised of 2880 Stream Processors, 240 TAUs, and 48 ROPs.

Display Graphs

Hide Graphs

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 780 Ti		10900 points
GeForce GTX 660		5063 points
	Difference: 5837 (115%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 110 Watts (79%)

Memory Bandwidth

The GeForce GTX 780 Ti should in theory perform much faster than the GeForce GTX 660 in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 191808 (133%)

Texel Rate

The GeForce GTX 780 Ti should be much (about 168%) better at texture filtering than the GeForce GTX 660. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 131600 (168%)

Pixel Rate

The GeForce GTX 780 Ti should be much (approximately 79%) more effective at AA than the GeForce GTX 660, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 18480 (79%)

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 max amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.