GeForce RTX 4080 vs Radeon RX 7900 XTX

Intro

Compare all of that to the Radeon RX 7900 XTX, which features GPU clock speed of 1855 MHz, and 24576 MB of GDDR6 memory set to run at 2500 MHz through a 384-bit bus. It also is comprised of 6144 Stream Processors, 384 Texture Address Units, and 192 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080		320 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 35 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XTX should perform much faster than the GeForce RTX 4080 in general. (explain)

Radeon RX 7900 XTX		983040 MB/sec
GeForce RTX 4080		734003 MB/sec
	Difference: 249037 (34%)

Texel Rate

The Radeon RX 7900 XTX should be a little bit (more or less 6%) faster with regards to texture filtering than the GeForce RTX 4080. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
GeForce RTX 4080		670320 Mtexels/sec
	Difference: 42000 (6%)

Pixel Rate

The Radeon RX 7900 XTX is much (about 44%) more effective at FSAA than the GeForce RTX 4080, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
GeForce RTX 4080		246960 Mpixels/sec
	Difference: 109200 (44%)

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 data (in units of MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.