Radeon HD 7790 vs Radeon RX 6600

Intro

Compare all that to the Radeon RX 6600, which comes with clock speeds of 1626 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 memory. It features 1792 SPUs as well as 112 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon RX 6600		132 Watts
	Difference: 47 Watts (55%)

Memory Bandwidth

The Radeon RX 6600 should in theory perform much faster than the Radeon HD 7790 overall. (explain)

Radeon RX 6600		229376 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 133376 (139%)

Texel Rate

The Radeon RX 6600 should be much (about 225%) better at texture filtering than the Radeon HD 7790. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 126112 (225%)

Pixel Rate

The Radeon RX 6600 will be much (more or less 550%) more effective at FSAA than the Radeon HD 7790, and also capable of handling higher resolutions better. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 88064 (550%)

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 information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount 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 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 processed in one second.

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