GeForce RTX 4090 vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which uses a 5 nm design. AMD has set the core frequency at 1855 MHz. The GDDR6 memory works at a frequency of 2500 MHz on this model. It features 6144 SPUs along with 384 TAUs and 192 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XTX		355 Watts
GeForce RTX 4090		450 Watts
	Difference: 95 Watts (27%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 4090 is 6% quicker than the Radeon RX 7900 XTX overall, due to its higher bandwidth. (explain)

GeForce RTX 4090		1042432 MB/sec
Radeon RX 7900 XTX		983040 MB/sec
	Difference: 59392 (6%)

Texel Rate

The GeForce RTX 4090 is much (approximately 61%) more effective at anisotropic filtering than the Radeon RX 7900 XTX. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
Radeon RX 7900 XTX		712320 Mtexels/sec
	Difference: 432000 (61%)

Pixel Rate

The GeForce RTX 4090 will be just a bit (about 10%) more effective at full screen anti-aliasing than the Radeon RX 7900 XTX, and will be able to handle higher resolutions without slowing down too much. (explain)

GeForce RTX 4090		393360 Mpixels/sec
Radeon RX 7900 XTX		356160 Mpixels/sec
	Difference: 37200 (10%)

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 information (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 processed per second. This number is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.