GeForce RTX 4080 vs Radeon RX 6800

Intro

Compare those specifications to the Radeon RX 6800, which has core clock speeds of 1700 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 memory. It features 3840 SPUs along with 240 Texture Address Units and 96 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800		250 Watts
GeForce RTX 4080		320 Watts
	Difference: 70 Watts (28%)

Memory Bandwidth

The GeForce RTX 4080 should in theory be much faster than the Radeon RX 6800 in general. (explain)

GeForce RTX 4080		734003 MB/sec
Radeon RX 6800		524288 MB/sec
	Difference: 209715 (40%)

Texel Rate

The GeForce RTX 4080 should be quite a bit (about 64%) more effective at texture filtering than the Radeon RX 6800. (explain)

GeForce RTX 4080		670320 Mtexels/sec
Radeon RX 6800		408000 Mtexels/sec
	Difference: 262320 (64%)

Pixel Rate

The GeForce RTX 4080 will be a lot (about 51%) more effective at FSAA than the Radeon RX 6800, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce RTX 4080		246960 Mpixels/sec
Radeon RX 6800		163200 Mpixels/sec
	Difference: 83760 (51%)

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 megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.