GeForce 8500 GT vs Radeon HD 6670 (OEM)

Intro

Compare those specs to the Radeon HD 6670 (OEM), which features core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 RAM. It features 480 SPUs along with 24 TAUs 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 6670 (OEM)		63 Watts
	Difference: 18 Watts (40%)

Memory Bandwidth

Theoretically, the Radeon HD 6670 (OEM) should perform quite a bit faster than the GeForce 8500 GT in general. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6670 (OEM) will be much (approximately 433%) more effective at texture filtering than the GeForce 8500 GT. (explain)

Radeon HD 6670 (OEM)		19200 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 15600 (433%)

Pixel Rate

The Radeon HD 6670 (OEM) will be quite a bit (more or less 256%) more effective at AA than the GeForce 8500 GT, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6670 (OEM)		6400 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 4600 (256%)

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 maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.