GeForce RTX 4090 vs Radeon RX 6800

Intro

Compare those specifications to the Radeon RX 6800, which uses a 7 nm design. AMD has clocked the core speed at 1700 MHz. The GDDR6 RAM is set to run at a frequency of 2000 MHz on this card. It features 3840 SPUs along with 240 Texture Address Units and 96 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
GeForce RTX 4090		450 Watts
	Difference: 200 Watts (80%)

Memory Bandwidth

The GeForce RTX 4090 should in theory be a lot faster than the Radeon RX 6800 in general. (explain)

GeForce RTX 4090		1042432 MB/sec
Radeon RX 6800		524288 MB/sec
	Difference: 518144 (99%)

Texel Rate

The GeForce RTX 4090 will be much (more or less 180%) faster with regards to anisotropic filtering than the Radeon RX 6800. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
Radeon RX 6800		408000 Mtexels/sec
	Difference: 736320 (180%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce RTX 4090 is superior to the Radeon RX 6800, by far. (explain)

GeForce RTX 4090		393360 Mpixels/sec
Radeon RX 6800		163200 Mpixels/sec
	Difference: 230160 (141%)

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core 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 lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.