Geforce GTX 760 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which comes with core 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 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Geforce GTX 760		170 Watts
	Difference: 45 Watts (36%)

Memory Bandwidth

Performance-wise, the Geforce GTX 760 should in theory be a small bit superior to the Radeon R9 M390X overall. (explain)

Geforce GTX 760		192256 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 32256 (20%)

Texel Rate

The Geforce GTX 760 will be a bit (more or less 2%) more effective at AF than the Radeon R9 M390X. (explain)

Geforce GTX 760		94080 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 1536 (2%)

Pixel Rate

The Geforce GTX 760 should be much (more or less 36%) better at full screen anti-aliasing than the Radeon R9 M390X, and also should be capable of handling higher resolutions better. (explain)

Geforce GTX 760		31360 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 8224 (36%)

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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, 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 can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.