GeForce RTX 3080 Ti vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which comes with GPU core speed of 863 MHz, and 3072 MB of GDDR5 RAM running at 1502 MHz through a 384-bit bus. It also is comprised of 2304 Stream Processors, 192 Texture Address Units, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 780		250 Watts
GeForce RTX 3080 Ti		350 Watts
	Difference: 100 Watts (40%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 Ti is 224% faster than the Geforce GTX 780 in general, due to its greater data rate. (explain)

GeForce RTX 3080 Ti		934297 MB/sec
Geforce GTX 780		288384 MB/sec
	Difference: 645913 (224%)

Texel Rate

The GeForce RTX 3080 Ti should be much (more or less 164%) faster with regards to AF than the Geforce GTX 780. (explain)

GeForce RTX 3080 Ti		436800 Mtexels/sec
Geforce GTX 780		165696 Mtexels/sec
	Difference: 271104 (164%)

Pixel Rate

The GeForce RTX 3080 Ti should be much (approximately 269%) better at AA than the Geforce GTX 780, and should be capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 3080 Ti		152880 Mpixels/sec
Geforce GTX 780		41424 Mpixels/sec
	Difference: 111456 (269%)

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 max amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.