Geforce GTX 780 vs Radeon RX 6800 XT

Intro

Compare those specifications to the Radeon RX 6800 XT, which uses a 7 nm design. AMD has set the core frequency at 1825 MHz. The GDDR6 memory works at a speed of 2000 MHz on this model. It features 4608 SPUs along with 288 Texture Address Units and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 780		250 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 50 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 XT should be 82% faster than the Geforce GTX 780 overall, because of its higher data rate. (explain)

Radeon RX 6800 XT		524288 MB/sec
Geforce GTX 780		288384 MB/sec
	Difference: 235904 (82%)

Texel Rate

The Radeon RX 6800 XT should be quite a bit (about 217%) faster with regards to texture filtering than the Geforce GTX 780. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Geforce GTX 780		165696 Mtexels/sec
	Difference: 359904 (217%)

Pixel Rate

The Radeon RX 6800 XT will be quite a bit (more or less 464%) more effective at FSAA than the Geforce GTX 780, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Geforce GTX 780		41424 Mpixels/sec
	Difference: 192176 (464%)

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 (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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