Radeon HD 4870 X2 vs Radeon RX 6600 XT

Intro

Compare those specs to the Radeon RX 6600 XT, which makes use of a 7 nm design. AMD has clocked the core frequency at 1968 MHz. The GDDR6 memory works at a speed of 2000 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

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

Performance-wise, the Radeon RX 6600 XT should in theory be a small bit better 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 is quite a bit (more or less 320%) more effective at 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 running with high levels of AA is important to you, then the Radeon RX 6600 XT is a better choice, 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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.