GeForce RTX 4080 vs GeForce RTX 4090

Intro

Compare those specifications to the GeForce RTX 4090, which has core clock speeds of 2235 MHz on the GPU, and 1325 MHz on the 24576 MB of GDDR6X RAM. It features 16384 SPUs along with 512 TAUs and 176 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080		320 Watts
GeForce RTX 4090		450 Watts
	Difference: 130 Watts (41%)

Memory Bandwidth

In theory, the GeForce RTX 4090 will be 42% faster than the GeForce RTX 4080 overall, due to its greater bandwidth. (explain)

GeForce RTX 4090		1042432 MB/sec
GeForce RTX 4080		734003 MB/sec
	Difference: 308429 (42%)

Texel Rate

The GeForce RTX 4090 will be a lot (more or less 71%) better at texture filtering than the GeForce RTX 4080. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
GeForce RTX 4080		670320 Mtexels/sec
	Difference: 474000 (71%)

Pixel Rate

The GeForce RTX 4090 should be a lot (more or less 59%) more effective at FSAA than the GeForce RTX 4080, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce RTX 4090		393360 Mpixels/sec
GeForce RTX 4080		246960 Mpixels/sec
	Difference: 146400 (59%)

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 max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 potential to get to the max fill rate.