GeForce GTX 660 vs Radeon R9 285

Intro

Compare those specs to the Radeon R9 285, which has a core clock frequency of 918 MHz and a GDDR5 memory speed of 1375 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 TAUs, and 32 ROPs.

Display Graphs

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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 R9 285		8500 points
GeForce GTX 660		5063 points
	Difference: 3437 (68%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon R9 285		190 Watts
	Difference: 50 Watts (36%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be much faster than the GeForce GTX 660 in general. (explain)

Radeon R9 285		176000 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 31808 (22%)

Texel Rate

The Radeon R9 285 is quite a bit (approximately 31%) better at texture filtering than the GeForce GTX 660. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 24416 (31%)

Pixel Rate

The Radeon R9 285 should be much (about 25%) faster with regards to AA than the GeForce GTX 660, and also able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 5856 (25%)

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: Bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.