GeForce 8500 GT vs Radeon HD 6570 (OEM) 1GB

Intro

Compare those specs to the Radeon HD 6570 (OEM) 1GB, which features clock speeds of 650 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 RAM. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
Radeon HD 6570 (OEM) 1GB		50 Watts
	Difference: 5 Watts (11%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6570 (OEM) 1GB should theoretically be quite a bit better than the GeForce 8500 GT in general. (explain)

Radeon HD 6570 (OEM) 1GB		28800 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB will be much (more or less 333%) better at anisotropic filtering than the GeForce 8500 GT. (explain)

Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 12000 (333%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6570 (OEM) 1GB is the winner, by far. (explain)

Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 3400 (189%)

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 maximum amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card 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 record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.