GeForce RTX 4090 vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which has clock speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 memory. 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

In theory, the GeForce RTX 4090 should perform just a bit faster than 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 much (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

If running with lots of anti-aliasing is important to you, then the GeForce RTX 4090 is the winner, though only just barely. (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: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 ability to get to the max fill rate.