Radeon HD 7970 vs Radeon RX 6600

Intro

Compare those specs to the Radeon RX 6600, which makes use of a 7 nm design. AMD has set the core speed at 1626 MHz. The GDDR6 RAM runs at a speed of 1750 MHz on this card. It features 1792 SPUs along with 112 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600		132 Watts
Radeon HD 7970		250 Watts
	Difference: 118 Watts (89%)

Memory Bandwidth

Performance-wise, the Radeon HD 7970 should in theory be a little bit better than the Radeon RX 6600 overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon RX 6600		229376 MB/sec
	Difference: 34624 (15%)

Texel Rate

The Radeon RX 6600 should be much (about 54%) more effective at AF than the Radeon HD 7970. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 7970		118400 Mtexels/sec
	Difference: 63712 (54%)

Pixel Rate

The Radeon RX 6600 should be much (more or less 252%) faster with regards to full screen anti-aliasing than the Radeon HD 7970, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 74464 (252%)

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: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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