GeForce GTX 1080 vs Radeon R9 285

Intro

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

GeForce GTX 1080		21942 points
Radeon R9 285		8500 points
	Difference: 13442 (158%)

Ethereum Mining Hash Rate

GeForce GTX 1080		20 Mh/s
Radeon R9 285		18 Mh/s
	Difference: 2 (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1080		180 Watts
Radeon R9 285		190 Watts
	Difference: 10 Watts (6%)

Memory Bandwidth

The GeForce GTX 1080 should in theory perform much faster than the Radeon R9 285 overall. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 151680 (86%)

Texel Rate

The GeForce GTX 1080 is much (approximately 150%) better at anisotropic filtering than the Radeon R9 285. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 154304 (150%)

Pixel Rate

The GeForce GTX 1080 will be much (about 250%) more effective at full screen anti-aliasing than the Radeon R9 285, and will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 73472 (250%)

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 MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 can be applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one 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. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 ability to reach the maximum fill rate.