Radeon HD 4890 1GB vs Radeon RX 6500 XT

Intro

Compare those specs to the Radeon RX 6500 XT, which comes with a core clock speed of 2200 MHz and a GDDR6 memory speed of 2250 MHz. It also uses a 64-bit memory bus, and makes use of a 6 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6500 XT		107 Watts
Radeon HD 4890 1GB		190 Watts
	Difference: 83 Watts (78%)

Memory Bandwidth

In theory, the Radeon RX 6500 XT is 18% faster than the Radeon HD 4890 1GB overall, because of its greater data rate. (explain)

Radeon RX 6500 XT		147456 MB/sec
Radeon HD 4890 1GB		124800 MB/sec
	Difference: 22656 (18%)

Texel Rate

The Radeon RX 6500 XT should be much (more or less 252%) better at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 100800 (252%)

Pixel Rate

The Radeon RX 6500 XT is quite a bit (about 340%) better at AA than the Radeon HD 4890 1GB, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
Radeon HD 4890 1GB		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: Memory bandwidth is the max amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.