GeForce GTX 660 vs Radeon RX 580

Intro

Compare all that to the Radeon RX 580, which has GPU clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 580		13630 points
GeForce GTX 660		5063 points
	Difference: 8567 (169%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon RX 580		185 Watts
	Difference: 45 Watts (32%)

Memory Bandwidth

The Radeon RX 580 should in theory perform quite a bit faster than the GeForce GTX 660 overall. (explain)

Radeon RX 580		262144 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 117952 (82%)

Texel Rate

The Radeon RX 580 will be a lot (approximately 131%) faster with regards to texture filtering than the GeForce GTX 660. (explain)

Radeon RX 580		181008 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 102608 (131%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 580 is the winner, by a large margin. (explain)

Radeon RX 580		40224 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 16704 (71%)

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 information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.