Geforce GTX 780 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which has core clock 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)

Radeon R9 M395X		125 Watts
Geforce GTX 780		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 should be 80% quicker than the Radeon R9 M395X in general, due to its higher bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 128384 (80%)

Texel Rate

The Geforce GTX 780 is a lot (approximately 79%) better at AF than the Radeon R9 M395X. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 73152 (79%)

Pixel Rate

The Geforce GTX 780 is much (about 79%) more effective at FSAA than the Radeon R9 M395X, and also able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 18288 (79%)

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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 per second. This 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one 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. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.