Radeon HD 4870 512MB vs Radeon RX 6500 XT

Intro

Compare those specifications to the Radeon RX 6500 XT, which makes use of a 6 nm design. AMD has clocked the core speed at 2200 MHz. The GDDR6 memory runs at a frequency of 2250 MHz on this specific card. It features 1024 SPUs along with 64 Texture Address Units 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 4870 512MB		150 Watts
	Difference: 43 Watts (40%)

Memory Bandwidth

The Radeon RX 6500 XT, in theory, should perform a lot faster than the Radeon HD 4870 512MB in general. (explain)

Radeon RX 6500 XT		147456 MB/sec
Radeon HD 4870 512MB		115200 MB/sec
	Difference: 32256 (28%)

Texel Rate

The Radeon RX 6500 XT is much (more or less 369%) more effective at anisotropic filtering than the Radeon HD 4870 512MB. (explain)

Radeon RX 6500 XT		140800 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 110800 (369%)

Pixel Rate

The Radeon RX 6500 XT is much (more or less 487%) faster with regards to anti-aliasing than the Radeon HD 4870 512MB, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 6500 XT		70400 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 58400 (487%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher 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 amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.