Radeon HD 3850 256MB vs Radeon RX 6900 XT

Intro

Compare all of that to the Radeon RX 6900 XT, which features a clock frequency of 1825 MHz and a GDDR6 memory frequency of 2000 MHz. It also features a 256-bit memory bus, and uses a 7 nm design. It is comprised of 5120 SPUs, 320 TAUs, and 128 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 256MB		75 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 225 Watts (300%)

Memory Bandwidth

In theory, the Radeon RX 6900 XT should be much faster than the Radeon HD 3850 256MB in general. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon HD 3850 256MB		52992 MB/sec
	Difference: 471296 (889%)

Texel Rate

The Radeon RX 6900 XT will be a lot (more or less 5364%) faster with regards to texture filtering than the Radeon HD 3850 256MB. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon HD 3850 256MB		10688 Mtexels/sec
	Difference: 573312 (5364%)

Pixel Rate

The Radeon RX 6900 XT is quite a bit (approximately 2086%) better at AA than the Radeon HD 3850 256MB, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon HD 3850 256MB		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 (counted in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.