Radeon HD 7870 vs Radeon RX 6600

Intro

Compare those specs to the Radeon RX 6600, which features a clock frequency of 1626 MHz and a GDDR6 memory frequency of 1750 MHz. It also features a 128-bit bus, and makes use of a 7 nm design. It is made up of 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 7870		175 Watts
	Difference: 43 Watts (33%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6600 should theoretically be much better than the Radeon HD 7870 in general. (explain)

Radeon RX 6600		229376 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 75776 (49%)

Texel Rate

The Radeon RX 6600 will be much (about 128%) faster with regards to texture filtering than the Radeon HD 7870. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 102112 (128%)

Pixel Rate

The Radeon RX 6600 should be much (approximately 225%) more effective at FSAA than the Radeon HD 7870, and also capable of handling higher resolutions better. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 72064 (225%)

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 moved past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units by the core clock 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.