GeForce GTX 480 vs Radeon R9 M295X

Intro

Compare that to the Radeon R9 M295X, which has GPU clock speed of 750 MHz, and 4096 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also features 2048 SPUs, 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 480		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

The GeForce GTX 480, in theory, should be just a bit faster 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 (more or less 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 should be much (about 40%) faster with regards to FSAA than the Radeon R9 M295X, and will be able to handle higher resolutions while still performing well. (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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.