GeForce RTX 3080 12 GB vs GeForce RTX 3090

Intro

Compare that to the GeForce RTX 3090, which has core speeds of 1395 MHz on the GPU, and 1219 MHz on the 24576 MB of GDDR6X RAM. It features 10496 SPUs as well as 328 Texture Address Units and 112 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the GeForce RTX 3090 should in theory be a little bit better than the GeForce RTX 3080 12 GB in general. (explain)

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

Texel Rate

The GeForce RTX 3090 is a lot (approximately 30%) better at AF 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

The GeForce RTX 3090 should be a little bit (about 11%) faster with regards to anti-aliasing than the GeForce RTX 3080 12 GB, and capable of handling higher resolutions more effectively. (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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at 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 can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.