Geforce GTX 680 vs Radeon R9 285

Intro

Compare all of that to the Radeon R9 285, which has a GPU core clock speed of 918 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, 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 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

Performance-wise, the Geforce GTX 680 should theoretically be a bit better than the Radeon R9 285 overall. (explain)

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

Texel Rate

The Geforce GTX 680 is much (more or less 25%) faster with regards to anisotropic filtering 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 will be a small bit (approximately 10%) more effective at FSAA than the Radeon R9 285, and also will be capable of handling higher resolutions better. (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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.