GeForce GTX 750 vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which comes with core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

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

The Radeon R9 M390X should theoretically be much faster 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%) faster with regards to AF 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 is quite a bit (approximately 42%) more effective at FSAA than the GeForce GTX 750, and able to handle higher screen resolutions more effectively. (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 MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 figure is worked out by multiplying the total amount of 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.