GeForce GTX 780 Ti vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which has GPU core speed of 750 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 780 Ti should in theory be quite a bit better than the Radeon R9 M295X in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 160000 (91%)

Texel Rate

The GeForce GTX 780 Ti is a lot (about 119%) better at anisotropic filtering than the Radeon R9 M295X. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 114000 (119%)

Pixel Rate

The GeForce GTX 780 Ti will be a lot (approximately 75%) more effective at full screen anti-aliasing than the Radeon R9 M295X, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 18000 (75%)

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 data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.