GeForce RTX 4090 vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which features a core clock frequency of 1855 MHz and a GDDR6 memory speed of 2500 MHz. It also features a 384-bit bus, and makes use of a 5 nm design. It is made up of 6144 SPUs, 384 Texture Address Units, and 192 ROPs.

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

As far as performance goes, the GeForce RTX 4090 should in theory be a small bit superior to the Radeon RX 7900 XTX in general. (explain)

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

Texel Rate

The GeForce RTX 4090 should be a lot (about 61%) faster with regards to AF 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 should be a little bit (about 10%) better at full screen anti-aliasing than the Radeon RX 7900 XTX, and also able to handle higher resolutions while still performing well. (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 largest amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.