GeForce RTX 3080 vs GeForce RTX 4090

Intro

Compare those specifications to the GeForce RTX 4090, which comes with core clock speeds of 2235 MHz on the GPU, and 1325 MHz on the 24576 MB of GDDR6X memory. It features 16384 SPUs along with 512 Texture Address Units and 176 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080		320 Watts
GeForce RTX 4090		450 Watts
	Difference: 130 Watts (41%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 4090 should in theory be a lot superior to the GeForce RTX 3080 overall. (explain)

GeForce RTX 4090		1042432 MB/sec
GeForce RTX 3080		778547 MB/sec
	Difference: 263885 (34%)

Texel Rate

The GeForce RTX 4090 is quite a bit (approximately 192%) more effective at texture filtering than the GeForce RTX 3080. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
GeForce RTX 3080		391680 Mtexels/sec
	Difference: 752640 (192%)

Pixel Rate

The GeForce RTX 4090 will be a lot (approximately 185%) faster with regards to full screen anti-aliasing than the GeForce RTX 3080, and also able to handle higher screen resolutions better. (explain)

GeForce RTX 4090		393360 Mpixels/sec
GeForce RTX 3080		138240 Mpixels/sec
	Difference: 255120 (185%)

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 largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.