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

Intro

Compare that to the Radeon HD 6570 (OEM) 1GB, which has core clock speeds of 650 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 480 SPUs along with 24 TAUs and 8 ROPs.

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 overall. (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 is much (about 333%) better at AF 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

The Radeon HD 6570 (OEM) 1GB should be quite a bit (approximately 189%) better at AA than the GeForce 8500 GT, and also should be capable of handling higher resolutions more effectively. (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 max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.