GeForce GTX 660 vs Radeon RX 7900 XT

Intro

Compare that to the Radeon RX 7900 XT, which features a clock speed of 1500 MHz and a GDDR6 memory speed of 2500 MHz. It also makes use of a 320-bit bus, and uses a 5 nm design. It is comprised of 5376 SPUs, 336 Texture Address Units, and 192 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon RX 7900 XT		300 Watts
	Difference: 160 Watts (114%)

Memory Bandwidth

In theory, the Radeon RX 7900 XT should perform much faster than the GeForce GTX 660 overall. (explain)

Radeon RX 7900 XT		819200 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 675008 (468%)

Texel Rate

The Radeon RX 7900 XT will be much (more or less 543%) faster with regards to texture filtering than the GeForce GTX 660. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 425600 (543%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 7900 XT is a better choice, and very much so. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 264480 (1124%)

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 data (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.