GeForce RTX 2080 vs GeForce RTX 4090

Intro

Compare those specs to the GeForce RTX 4090, which features GPU core speed of 2235 MHz, and 24576 MB of GDDR6X RAM running at 1325 MHz through a 384-bit bus. It also is comprised of 16384 SPUs, 512 TAUs, and 176 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2080		215 Watts
GeForce RTX 4090		450 Watts
	Difference: 235 Watts (109%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 4090 should in theory be much superior to the GeForce RTX 2080 overall. (explain)

GeForce RTX 4090		1042432 MB/sec
GeForce RTX 2080		458752 MB/sec
	Difference: 583680 (127%)

Texel Rate

The GeForce RTX 4090 is a lot (approximately 311%) better at texture filtering than the GeForce RTX 2080. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
GeForce RTX 2080		278760 Mtexels/sec
	Difference: 865560 (311%)

Pixel Rate

The GeForce RTX 4090 should be quite a bit (approximately 306%) better at AA than the GeForce RTX 2080, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce RTX 4090		393360 Mpixels/sec
GeForce RTX 2080		96960 Mpixels/sec
	Difference: 296400 (306%)

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 data (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.