GeForce GTX 460 (OEM) vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which uses a 28 nm design. AMD has clocked the core frequency at 940 MHz. The DDR3 memory runs at a speed of 1000 MHz on this specific card. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 460 (OEM) should in theory be quite a bit superior to the Radeon R5 M255 in general. (explain)

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

Texel Rate

The GeForce GTX 460 (OEM) is a lot (approximately 94%) better at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 17600 (94%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 460 (OEM) is superior to the Radeon R5 M255, by a large margin. (explain)

GeForce GTX 460 (OEM)		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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.