GeForce GTX 1080 vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this particular model. It features 2560 SPUs as well as 160 TAUs and 64 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

GeForce GTX 1080		21942 points
Radeon R9 390 8G		12733 points
	Difference: 9209 (72%)

Zcash Mining Hash Rate

GeForce GTX 1080		553 Sol/s
Radeon R9 390 8G		326 Sol/s
	Difference: 227 (70%)

Ethereum Mining Hash Rate

Radeon R9 390 8G		28 Mh/s
GeForce GTX 1080		20 Mh/s
	Difference: 8 (40%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1080		180 Watts
Radeon R9 390 8G		275 Watts
	Difference: 95 Watts (53%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be a small bit better than the GeForce GTX 1080 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 1080		327680 MB/sec
	Difference: 56320 (17%)

Texel Rate

The GeForce GTX 1080 is much (more or less 61%) more effective at texture filtering than the Radeon R9 390 8G. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 97120 (61%)

Pixel Rate

The GeForce GTX 1080 should be a lot (approximately 61%) more effective at full screen anti-aliasing than the Radeon R9 390 8G, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 38848 (61%)

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 max amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the 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 maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.