GeForce GTX 465 vs Radeon R9 270

Intro

Compare all of that to the Radeon R9 270, which features a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1400 MHz through a 256-bit bus. It also is made up of 1280 Stream Processors, 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 465		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

The Radeon R9 270 should in theory perform a lot faster than the GeForce GTX 465 in general. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 76608 (75%)

Texel Rate

The Radeon R9 270 is a lot (approximately 170%) more effective at texture filtering than the GeForce GTX 465. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 45292 (170%)

Pixel Rate

The Radeon R9 270 should be a lot (about 48%) more effective at AA than the GeForce GTX 465, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 9376 (48%)

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 max amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.