GeForce RTX 3080 12 GB vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which comes with a clock speed of 863 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It features 2304 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 780		250 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 100 Watts (40%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should perform quite a bit faster than the Geforce GTX 780 overall. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Geforce GTX 780		288384 MB/sec
	Difference: 645914 (224%)

Texel Rate

The GeForce RTX 3080 12 GB will be quite a bit (more or less 113%) better at anisotropic filtering than the Geforce GTX 780. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Geforce GTX 780		165696 Mtexels/sec
	Difference: 187104 (113%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce RTX 3080 12 GB is superior to the Geforce GTX 780, and very much so. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Geforce GTX 780		41424 Mpixels/sec
	Difference: 99696 (241%)

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 (in units of megabytes 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 clock speed. In the case of DDR 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 anti-aliasing, HDR and higher screen 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 number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.