GeForce GTX Titan Black vs Radeon R9 M390X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the GeForce GTX Titan Black should theoretically be much better than the Radeon R9 M390X in general. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 176000 (110%)

Texel Rate

The GeForce GTX Titan Black will be much (about 131%) more effective at texture filtering than the Radeon R9 M390X. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 120816 (131%)

Pixel Rate

The GeForce GTX Titan Black should be a lot (approximately 84%) better at anti-aliasing than the Radeon R9 M390X, and capable of handling higher resolutions more effectively. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 19536 (84%)

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 (in units of MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.