Radeon HD 4870 X2 vs Radeon RX 6600

Intro

Compare those specifications to the Radeon RX 6600, which has a core clock speed of 1626 MHz and a GDDR6 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and uses a 7 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600		132 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 218 Watts (165%)

Memory Bandwidth

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

Radeon HD 4870 X2		230400 MB/sec
Radeon RX 6600		229376 MB/sec
	Difference: 1024 (0%)

Texel Rate

The Radeon RX 6600 should be quite a bit (more or less 204%) faster with regards to AF than the Radeon HD 4870 X2. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 122112 (204%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 6600 is a better choice, by a large margin. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 80064 (334%)

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 data (in units of MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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 calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output 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 reach the maximum fill rate.