GeForce GTX 650 Ti 2GB vs GeForce GTX 780 Ti

Intro

Compare all of that to the GeForce GTX 780 Ti, which makes use of a 28 nm design. nVidia has set the core speed at 875 MHz. The GDDR5 RAM works at a frequency of 1750 MHz on this card. It features 2880 SPUs as well as 240 TAUs and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti 2GB		110 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 140 Watts (127%)

Memory Bandwidth

The GeForce GTX 780 Ti should in theory perform much faster than the GeForce GTX 650 Ti 2GB in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 249600 (289%)

Texel Rate

The GeForce GTX 780 Ti should be quite a bit (approximately 254%) faster with regards to anisotropic filtering than the GeForce GTX 650 Ti 2GB. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
	Difference: 150608 (254%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 780 Ti is a better choice, and very much so. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 27152 (183%)

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 (counted in megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.