GeForce GTX 460 (OEM) vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which has clock speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 should be much faster than the GeForce GTX 460 (OEM) in general. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 70400 (65%)

Texel Rate

The Radeon R9 270 will be a lot (about 98%) faster with regards to anisotropic filtering than the GeForce GTX 460 (OEM). (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 35600 (98%)

Pixel Rate

The Radeon R9 270 will be much (approximately 38%) better at full screen anti-aliasing than the GeForce GTX 460 (OEM), and also able to handle higher screen resolutions more effectively. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 460 (OEM)		20800 Mpixels/sec
	Difference: 8000 (38%)

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 information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that are applied in one 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 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 graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.