GeForce RTX 3090 vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which has a clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 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 3090		350 Watts
	Difference: 155 Watts (79%)

Memory Bandwidth

The GeForce RTX 3090 should theoretically be much faster than the Geforce GTX 680 in general. (explain)

GeForce RTX 3090		958668 MB/sec
Geforce GTX 680		192256 MB/sec
	Difference: 766412 (399%)

Texel Rate

The GeForce RTX 3090 should be quite a bit (more or less 255%) more effective at AF than the Geforce GTX 680. (explain)

GeForce RTX 3090		457560 Mtexels/sec
Geforce GTX 680		128768 Mtexels/sec
	Difference: 328792 (255%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce RTX 3090 is a better choice, by a large margin. (explain)

GeForce RTX 3090		156240 Mpixels/sec
Geforce GTX 680		32192 Mpixels/sec
	Difference: 124048 (385%)

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 maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.