GeForce RTX 4080 vs Radeon RX 6650 XT

Intro

Compare all of that to the Radeon RX 6650 XT, which features a clock speed of 2055 MHz and a GDDR6 memory speed of 2190 MHz. It also makes use of a 128-bit bus, and uses a 7 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
GeForce RTX 4080		320 Watts
	Difference: 144 Watts (82%)

Memory Bandwidth

In theory, the GeForce RTX 4080 should perform quite a bit faster than the Radeon RX 6650 XT overall. (explain)

GeForce RTX 4080		734003 MB/sec
Radeon RX 6650 XT		287072 MB/sec
	Difference: 446931 (156%)

Texel Rate

The GeForce RTX 4080 will be quite a bit (more or less 155%) better at texture filtering than the Radeon RX 6650 XT. (explain)

GeForce RTX 4080		670320 Mtexels/sec
Radeon RX 6650 XT		263040 Mtexels/sec
	Difference: 407280 (155%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce RTX 4080 is a better choice, by far. (explain)

GeForce RTX 4080		246960 Mpixels/sec
Radeon RX 6650 XT		131520 Mpixels/sec
	Difference: 115440 (88%)

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.