Radeon HD 4890 2GB vs Radeon RX 6500 XT

Intro

Compare those specifications to the Radeon RX 6500 XT, which features core speeds of 2200 MHz on the GPU, and 2250 MHz on the 4096 MB of GDDR6 memory. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6500 XT		107 Watts
Radeon HD 4890 2GB		190 Watts
	Difference: 83 Watts (78%)

Memory Bandwidth

The Radeon RX 6500 XT, in theory, should perform a small bit faster than the Radeon HD 4890 2GB overall. (explain)

Radeon RX 6500 XT		147456 MB/sec
Radeon HD 4890 2GB		124800 MB/sec
	Difference: 22656 (18%)

Texel Rate

The Radeon RX 6500 XT should be quite a bit (more or less 252%) better at texture filtering than the Radeon HD 4890 2GB. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 100800 (252%)

Pixel Rate

The Radeon RX 6500 XT will be quite a bit (approximately 340%) more effective at anti-aliasing than the Radeon HD 4890 2GB, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
Radeon HD 4890 2GB		16000 Mpixels/sec
	Difference: 54400 (340%)

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 max amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 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 number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.