Radeon HD 3850 512MB vs Radeon RX 6900 XT

Intro

Compare those specs to the Radeon RX 6900 XT, which has a clock speed of 1825 MHz and a GDDR6 memory speed of 2000 MHz. It also makes use of a 256-bit memory bus, and uses a 7 nm design. It is made up of 5120 SPUs, 320 Texture Address Units, and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 512MB		75 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 225 Watts (300%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6900 XT will be 889% quicker than the Radeon HD 3850 512MB in general, because of its higher data rate. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon HD 3850 512MB		52992 MB/sec
	Difference: 471296 (889%)

Texel Rate

The Radeon RX 6900 XT should be a lot (about 5364%) faster with regards to AF than the Radeon HD 3850 512MB. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 573312 (5364%)

Pixel Rate

The Radeon RX 6900 XT should be quite a bit (more or less 2086%) faster with regards to FSAA than the Radeon HD 3850 512MB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon HD 3850 512MB		10688 Mpixels/sec
	Difference: 222912 (2086%)

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 (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out 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 amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.