GeForce 8800 GT 256MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which has core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 160 SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
GeForce 8800 GT 256MB		105 Watts
	Difference: 74 Watts (239%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GT 256MB should be a lot faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

GeForce 8800 GT 256MB		44800 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 16000 (56%)

Texel Rate

The GeForce 8800 GT 256MB is quite a bit (approximately 460%) faster with regards to texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce 8800 GT 256MB		33600 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 27600 (460%)

Pixel Rate

The GeForce 8800 GT 256MB will be quite a bit (about 220%) better at AA than the Radeon HD 6450 (OEM) 1GB, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce 8800 GT 256MB		9600 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 6600 (220%)

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 max amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.