GeForce GTX 460 SE vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which features a GPU core clock speed of 940 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 64-bit bus. It also is made up of 320 Stream Processors, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 SE should theoretically be quite a bit superior to the Radeon R5 M255 overall. (explain)

GeForce GTX 460 SE		108800 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 92800 (580%)

Texel Rate

The GeForce GTX 460 SE is quite a bit (approximately 66%) more effective at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 460 SE		31200 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 12400 (66%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 460 SE is the winner, by far. (explain)

GeForce GTX 460 SE		20800 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 13280 (177%)

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 data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant 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 max fill rate.