GeForce RTX 3080 12 GB vs GeForce RTX 3090

Intro

Compare all that to the GeForce RTX 3090, which comes with GPU clock speed of 1395 MHz, and 24576 MB of GDDR6X memory set to run at 1219 MHz through a 384-bit bus. It also is comprised of 10496 SPUs, 328 TAUs, and 112 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The GeForce RTX 3090, in theory, should be just a bit faster than the GeForce RTX 3080 12 GB overall. (explain)

GeForce RTX 3090		958668 MB/sec
GeForce RTX 3080 12 GB		934298 MB/sec
	Difference: 24370 (3%)

Texel Rate

The GeForce RTX 3090 should be quite a bit (more or less 30%) better at texture filtering than the GeForce RTX 3080 12 GB. (explain)

GeForce RTX 3090		457560 Mtexels/sec
GeForce RTX 3080 12 GB		352800 Mtexels/sec
	Difference: 104760 (30%)

Pixel Rate

If using a high resolution is important to you, then the GeForce RTX 3090 is a better choice, but only just. (explain)

GeForce RTX 3090		156240 Mpixels/sec
GeForce RTX 3080 12 GB		141120 Mpixels/sec
	Difference: 15120 (11%)

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 maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that are applied per second. This is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.