GeForce GTX 860M vs Radeon R9 390 8G

Intro

Compare 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 memory runs at a speed of 1500 MHz on this specific model. It features 2560 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator 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 390 8G		12733 points
GeForce GTX 860M		4340 points
	Difference: 8393 (193%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon R9 390 8G		275 Watts
	Difference: 230 Watts (511%)

Memory Bandwidth

The Radeon R9 390 8G, in theory, should perform a lot faster than the GeForce GTX 860M in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 320000 (500%)

Texel Rate

The Radeon R9 390 8G should be a lot (more or less 109%) faster with regards to AF than the GeForce GTX 860M. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 860M		76512 Mtexels/sec
	Difference: 83488 (109%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390 8G is the winner, and very much so. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 51248 (402%)

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 max amount of information (counted in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.