GeForce GTX 660 vs Radeon RX 5500

Intro

Compare all that to the Radeon RX 5500, which makes use of a 7 nm design. AMD has set the core speed at 1670 MHz. The GDDR6 memory works at a frequency of 1750 MHz on this specific card. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon RX 5500		150 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

In theory, the Radeon RX 5500 should be 59% faster than the GeForce GTX 660 in general, because of its higher bandwidth. (explain)

Radeon RX 5500		229376 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 85184 (59%)

Texel Rate

The Radeon RX 5500 should be a lot (about 87%) faster with regards to anisotropic filtering than the GeForce GTX 660. (explain)

Radeon RX 5500		146960 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 68560 (87%)

Pixel Rate

The Radeon RX 5500 will be a lot (about 127%) better at full screen anti-aliasing than the GeForce GTX 660, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 5500		53440 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 29920 (127%)

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 (in units of MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must 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 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 number of texture units of the card by the core clock speed of the chip. The higher this number, 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 most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.