GeForce RTX 3080 12 GB vs Radeon HD 7950

Intro

Compare those specs to the Radeon HD 7950, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1536 MB of GDDR5 RAM. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 150 Watts (75%)

Memory Bandwidth

Theoretically, the GeForce RTX 3080 12 GB should perform much faster than the Radeon HD 7950 in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 694298 (289%)

Texel Rate

The GeForce RTX 3080 12 GB is much (about 294%) faster with regards to AF than the Radeon HD 7950. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 263200 (294%)

Pixel Rate

The GeForce RTX 3080 12 GB is much (about 451%) better at full screen anti-aliasing than the Radeon HD 7950, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 115520 (451%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, 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 can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes 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 memory bandwidth is, the lower the ability to get to the max fill rate.