GeForce GTX 465 vs Radeon HD 5850

Intro

Compare those specifications to the Radeon HD 5850, which features a GPU core clock speed of 725 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also features 1440(288x5) Stream Processors, 72 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850		151 Watts
GeForce GTX 465		200 Watts
	Difference: 49 Watts (32%)

Memory Bandwidth

Theoretically, the Radeon HD 5850 should be quite a bit faster than the GeForce GTX 465 in general. (explain)

Radeon HD 5850		128000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 25408 (25%)

Texel Rate

The Radeon HD 5850 is quite a bit (approximately 95%) faster with regards to AF than the GeForce GTX 465. (explain)

Radeon HD 5850		52200 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 25492 (95%)

Pixel Rate

The Radeon HD 5850 is a little bit (about 19%) faster with regards to FSAA than the GeForce GTX 465, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 5850		23200 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 3776 (19%)

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 largest amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that can be processed per second. This is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.