Radeon HD 4650 1GB vs Radeon RX 6900 XT

Intro

Compare all that to the Radeon RX 6900 XT, which uses a 7 nm design. AMD has clocked the core frequency at 1825 MHz. The GDDR6 memory works at a frequency of 2000 MHz on this specific model. It features 5120 SPUs along with 320 Texture Address Units and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon RX 6900 XT		300 Watts
	Difference: 245 Watts (445%)

Memory Bandwidth

Performance-wise, the Radeon RX 6900 XT should theoretically be quite a bit better than the Radeon HD 4650 1GB overall. (explain)

Radeon RX 6900 XT		524288 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 501888 (2241%)

Texel Rate

The Radeon RX 6900 XT is much (approximately 2942%) faster with regards to texture filtering than the Radeon HD 4650 1GB. (explain)

Radeon RX 6900 XT		584000 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 564800 (2942%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 6900 XT is superior to the Radeon HD 4650 1GB, by a large margin. (explain)

Radeon RX 6900 XT		233600 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 228800 (4767%)

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 maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling 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 the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.