Radeon HD 4870 2GB vs Radeon RX 5600 XT

Intro

Compare that to the Radeon RX 5600 XT, which has core clock speeds of 1375 MHz on the GPU, and 1500 MHz on the 6144 MB of GDDR6 memory. It features 2304 SPUs as well as 144 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB		150 Watts
Radeon RX 5600 XT		160 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5600 XT should be 199% faster than the Radeon HD 4870 2GB in general, due to its higher bandwidth. (explain)

Radeon RX 5600 XT		344064 MB/sec
Radeon HD 4870 2GB		115200 MB/sec
	Difference: 228864 (199%)

Texel Rate

The Radeon RX 5600 XT is a lot (about 560%) better at anisotropic filtering than the Radeon HD 4870 2GB. (explain)

Radeon RX 5600 XT		198000 Mtexels/sec
Radeon HD 4870 2GB		30000 Mtexels/sec
	Difference: 168000 (560%)

Pixel Rate

The Radeon RX 5600 XT should be much (more or less 633%) more effective at full screen anti-aliasing than the Radeon HD 4870 2GB, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
Radeon HD 4870 2GB		12000 Mpixels/sec
	Difference: 76000 (633%)

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 information (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video 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 most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.