GeForce 8500 GT vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specs to the Radeon HD 6450 (OEM) 1GB, which has GPU clock speed of 750 MHz, and 1024 MB of GDDR5 memory set to run at 900 MHz through a 64-bit bus. It also is made up of 160 Stream Processors, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
GeForce 8500 GT		45 Watts
	Difference: 14 Watts (45%)

Memory Bandwidth

Theoretically, the Radeon HD 6450 (OEM) 1GB should perform much faster than the GeForce 8500 GT in general. (explain)

Radeon HD 6450 (OEM) 1GB		28800 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB will be much (about 67%) more effective at texture filtering than the GeForce 8500 GT. (explain)

Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 2400 (67%)

Pixel Rate

The Radeon HD 6450 (OEM) 1GB will be much (more or less 67%) more effective at FSAA than the GeForce 8500 GT, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 1200 (67%)

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 over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that are applied per second. This number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.