GeForce RTX 3090 vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which uses a 5 nm design. AMD has clocked the core speed at 1855 MHz. The GDDR6 memory is set to run at a frequency of 2500 MHz on this particular card. It features 6144 SPUs along with 384 Texture Address Units and 192 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3090		350 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 5 Watts (1%)

Memory Bandwidth

In theory, the Radeon RX 7900 XTX will be 3% quicker than the GeForce RTX 3090 in general, because of its higher bandwidth. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 3090		958668 MB/sec
	Difference: 24372 (3%)

Texel Rate

The Radeon RX 7900 XTX should be much (about 56%) more effective at AF than the GeForce RTX 3090. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 3090		457560 Mtexels/sec
	Difference: 254760 (56%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 7900 XTX is the winner, by far. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 3090		156240 Mpixels/sec
	Difference: 199920 (128%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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