GeForce RTX 3080 12 GB vs Radeon HD 4850 512MB

Intro

Compare that to the Radeon HD 4850 512MB, which comes with clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 240 Watts (218%)

Memory Bandwidth

The GeForce RTX 3080 12 GB should theoretically be quite a bit faster than the Radeon HD 4850 512MB overall. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 870746 (1370%)

Texel Rate

The GeForce RTX 3080 12 GB will be quite a bit (more or less 1311%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 327800 (1311%)

Pixel Rate

The GeForce RTX 3080 12 GB is much (approximately 1311%) more effective at anti-aliasing than the Radeon HD 4850 512MB, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 131120 (1311%)

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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed in one 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. 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 output 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 reach the max fill rate.