Radeon HD 3850 1GB vs Radeon RX 6900 XT

Intro

Compare all that to the Radeon RX 6900 XT, which features a GPU core clock speed of 1825 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also 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 1GB		75 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 225 Watts (300%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6900 XT should in theory be much better than the Radeon HD 3850 1GB overall. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon HD 3850 1GB		52992 MB/sec
	Difference: 471296 (889%)

Texel Rate

The Radeon RX 6900 XT should be a lot (about 5364%) better at AF than the Radeon HD 3850 1GB. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 573312 (5364%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6900 XT is the winner, by a large margin. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon HD 3850 1GB		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 maximum amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.