Geforce GTX 680 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which comes with GPU clock speed of 918 MHz, and 2048 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

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 680		7650 points
	Difference: 850 (11%)

Ethereum Mining Hash Rate

Radeon R9 285		18 Mh/s
Geforce GTX 680		16 Mh/s
	Difference: 2 (13%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
Geforce GTX 680		195 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should perform a bit faster than the Radeon R9 285 in general. (explain)

Geforce GTX 680		192256 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 16256 (9%)

Texel Rate

The Geforce GTX 680 should be quite a bit (more or less 25%) faster with regards to AF than the Radeon R9 285. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 25952 (25%)

Pixel Rate

The Geforce GTX 680 is just a bit (approximately 10%) faster with regards to AA than the Radeon R9 285, and also will be able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 2816 (10%)

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 maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.