GeForce GTX 275 vs GeForce GTX 780 Ti

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 275		219 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 31 Watts (14%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 780 Ti is 165% quicker than the GeForce GTX 275 in general, because of its higher data rate. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 208992 (165%)

Texel Rate

The GeForce GTX 780 Ti is much (about 315%) faster with regards to texture filtering than the GeForce GTX 275. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 159360 (315%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 780 Ti is a better choice, by far. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 24276 (137%)

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 information (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, 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 card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.