GeForce GTX 650 Ti 2GB vs GeForce GTX 780 Ti

Intro

Compare those specifications 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 comprised of 2880 SPUs, 240 Texture Address Units, and 48 Raster Operation Units.

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

In theory, the GeForce GTX 780 Ti should be 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 a lot (approximately 254%) better at texture 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

The GeForce GTX 780 Ti is a lot (approximately 183%) better at FSAA than the GeForce GTX 650 Ti 2GB, and also should be able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better 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 that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated 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 drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.