GeForce GTX 285 2GB vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which has GPU core speed of 900 MHz, and 2048 MB of GDDR5 memory running at 1400 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270		150 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 270 is 13% quicker than the GeForce GTX 285 2GB overall, due to its higher data rate. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 20224 (13%)

Texel Rate

The Radeon R9 270 will be much (about 39%) faster with regards to texture filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 20160 (39%)

Pixel Rate

The Radeon R9 270 should be much (about 39%) better at anti-aliasing than the GeForce GTX 285 2GB, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 8064 (39%)

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 (counted in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 potential to get to the maximum fill rate.