Radeon HD 4870 X2 vs Radeon RX 6600 XT

Intro

Compare all that to the Radeon RX 6600 XT, which comes with GPU clock speed of 1968 MHz, and 8192 MB of GDDR6 memory set to run at 2000 MHz through a 128-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 190 Watts (119%)

Memory Bandwidth

Theoretically, the Radeon RX 6600 XT should perform a small bit faster than the Radeon HD 4870 X2 overall. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon HD 4870 X2		230400 MB/sec
	Difference: 31744 (14%)

Texel Rate

The Radeon RX 6600 XT should be quite a bit (about 320%) faster with regards to AF than the Radeon HD 4870 X2. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 191904 (320%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 6600 XT is superior to the Radeon HD 4870 X2, by a large margin. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 101952 (425%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are processed in one second. This is calculated 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 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 chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.