Radeon HD 7950 3GB vs Radeon RX 6800 XT

Intro

Compare all that to the Radeon RX 6800 XT, which comes with GPU core speed of 1825 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also is comprised of 4608 SPUs, 288 Texture Address Units, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		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 3GB in general. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 284288 (118%)

Texel Rate

The Radeon RX 6800 XT should be a lot (approximately 487%) more effective at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 436000 (487%)

Pixel Rate

The Radeon RX 6800 XT is a lot (about 813%) more effective at full screen anti-aliasing than the Radeon HD 7950 3GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon HD 7950 3GB		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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.