Radeon R9 290X vs Radeon RX 6600 XT

Intro

Compare those specifications to the Radeon RX 6600 XT, which comes with GPU core speed of 1968 MHz, and 8192 MB of GDDR6 RAM running at 2000 MHz through a 128-bit bus. It also features 2048 SPUs, 128 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
Radeon R9 290X		300 Watts
	Difference: 140 Watts (88%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 290X is 22% faster than the Radeon RX 6600 XT in general, because of its higher data rate. (explain)

Radeon R9 290X		320000 MB/sec
Radeon RX 6600 XT		262144 MB/sec
	Difference: 57856 (22%)

Texel Rate

The Radeon RX 6600 XT will be much (approximately 79%) more effective at AF than the Radeon R9 290X. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon R9 290X		140800 Mtexels/sec
	Difference: 111104 (79%)

Pixel Rate

The Radeon RX 6600 XT should be much (approximately 146%) more effective at anti-aliasing than the Radeon R9 290X, and also will be capable of handling higher resolutions better. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon R9 290X		51200 Mpixels/sec
	Difference: 74752 (146%)

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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.