GeForce GTX 950M vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
Radeon R9 M390X		125 Watts
	Difference: 70 Watts (127%)

Memory Bandwidth

The Radeon R9 M390X, in theory, should perform much faster than the GeForce GTX 950M in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 128000 (400%)

Texel Rate

The Radeon R9 M390X will be a lot (more or less 153%) better at AF than the GeForce GTX 950M. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 55984 (153%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M390X is a better choice, and very much so. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 950M		14624 Mpixels/sec
	Difference: 8512 (58%)

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 maximum amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core 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 a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.