GeForce GTX 660 vs Radeon RX 5500

Intro

Compare those specifications to the Radeon RX 5500, which has GPU clock speed of 1670 MHz, and 4096 MB of GDDR6 memory running at 1750 MHz through a 128-bit bus. It also features 1408 SPUs, 88 Texture Address Units, and 32 Raster Operation Units.

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

The Radeon RX 5500 should in theory be quite a bit faster than the GeForce GTX 660 overall. (explain)

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

Texel Rate

The Radeon RX 5500 will be quite a bit (about 87%) faster with regards to texture filtering than the GeForce GTX 660. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 5500 is a better choice, by far. (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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.