GeForce GTX 465 vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which has a clock frequency of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 32 ROPs.

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

As far as performance goes, the Radeon R9 270 should in theory be quite a bit better 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 should be much (about 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

If running with high levels of AA is important to you, then the Radeon R9 270 is superior to the GeForce GTX 465, by a large margin. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units of the card by the core 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 applied in a second.

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