GeForce GTX 460 2GB vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which has core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 460 2GB should in theory be quite a bit better than the Radeon R5 M255 overall. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 99200 (620%)

Texel Rate

The GeForce GTX 460 2GB will be a lot (about 101%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 19000 (101%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 460 2GB is the winner, by far. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 14080 (187%)

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 (measured in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 are processed in one second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.