Radeon HD 7950 vs Radeon RX 6800 XT

Intro

Compare all of that to the Radeon RX 6800 XT, which has clock speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 memory. It features 4608 SPUs as well as 288 Texture Address Units and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 100 Watts (50%)

Memory Bandwidth

Performance-wise, the Radeon RX 6800 XT should theoretically be quite a bit better than the Radeon HD 7950 in general. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 284288 (118%)

Texel Rate

The Radeon RX 6800 XT is a lot (approximately 487%) better at texture filtering than the Radeon HD 7950. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 436000 (487%)

Pixel Rate

The Radeon RX 6800 XT will be a lot (about 813%) more effective at FSAA than the Radeon HD 7950, and also will be able to handle higher screen resolutions better. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 208000 (813%)

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 data (in units of megabytes per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.