GeForce GTX 750 Ti 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 as well as 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 Ti		60 Watts
Radeon R9 M390X		125 Watts
	Difference: 65 Watts (108%)

Memory Bandwidth

The Radeon R9 M390X, in theory, should be much faster than the GeForce GTX 750 Ti overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 73600 (85%)

Texel Rate

The Radeon R9 M390X should be a lot (about 127%) better at anisotropic filtering than the GeForce GTX 750 Ti. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 51744 (127%)

Pixel Rate

The Radeon R9 M390X should be a lot (about 42%) more effective at AA than the GeForce GTX 750 Ti, and capable of handling higher screen resolutions better. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 750 Ti		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 information (in units of MB per second) that can be transported past the external memory interface within a second. It 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 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.