GeForce GTX 1070 Ti vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which has core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 1070 Ti		180 Watts
	Difference: 55 Watts (44%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1070 Ti is 64% quicker than the Radeon R9 M390X in general, because of its higher bandwidth. (explain)

GeForce GTX 1070 Ti		262144 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 102144 (64%)

Texel Rate

The GeForce GTX 1070 Ti will be quite a bit (about 164%) more effective at anisotropic filtering than the Radeon R9 M390X. (explain)

GeForce GTX 1070 Ti		244264 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 151720 (164%)

Pixel Rate

The GeForce GTX 1070 Ti will be a lot (approximately 345%) better at anti-aliasing than the Radeon R9 M390X, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 1070 Ti		102848 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 79712 (345%)

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 information (measured in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.