GeForce GTX 480 vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which has a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, 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 480		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the GeForce GTX 480 should theoretically be just a bit better than the Radeon R9 M295X in general. (explain)

GeForce GTX 480		177408 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 1408 (1%)

Texel Rate

The Radeon R9 M295X will be quite a bit (about 129%) faster with regards to AF than the GeForce GTX 480. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 480		42000 Mtexels/sec
	Difference: 54000 (129%)

Pixel Rate

The GeForce GTX 480 will be much (approximately 40%) better at FSAA than the Radeon R9 M295X, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 9600 (40%)

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 largest amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out 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 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 number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.