Radeon HD 4870 X2 vs Radeon RX 6600

Intro

Compare all that to the Radeon RX 6600, which has a clock frequency of 1626 MHz and a GDDR6 memory speed of 1750 MHz. It also makes use of a 128-bit bus, and makes use of a 7 nm design. It features 1792 SPUs, 112 Texture Address Units, and 64 ROPs.

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, the Radeon HD 4870 X2 should be 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 will be much (approximately 204%) faster with regards to texture filtering 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 high levels of AA is important to you, then the Radeon RX 6600 is superior to the Radeon HD 4870 X2, 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: Bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.