GeForce RTX 3080 12 GB vs Geforce GTX 680

Intro

Compare all of that to the Geforce GTX 680, which comes with a core clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It features 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 155 Watts (79%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should be quite a bit faster than the Geforce GTX 680 in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Geforce GTX 680		192256 MB/sec
	Difference: 742042 (386%)

Texel Rate

The GeForce RTX 3080 12 GB is quite a bit (about 174%) faster with regards to AF than the Geforce GTX 680. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Geforce GTX 680		128768 Mtexels/sec
	Difference: 224032 (174%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce RTX 3080 12 GB is the winner, by far. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Geforce GTX 680		32192 Mpixels/sec
	Difference: 108928 (338%)

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 (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines 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 lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.