GeForce GTX 750 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which features clock 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 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon R9 M390X		125 Watts
	Difference: 70 Watts (127%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should in theory be much better than the GeForce GTX 750 overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 80000 (100%)

Texel Rate

The Radeon R9 M390X should be much (approximately 184%) more effective at texture filtering than the GeForce GTX 750. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 59904 (184%)

Pixel Rate

The Radeon R9 M390X should be much (about 42%) better at AA than the GeForce GTX 750, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 750		16320 Mpixels/sec
	Difference: 6816 (42%)

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 data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. 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 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 get to the maximum fill rate.