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

Intro

Compare that to the Radeon HD 6450 (OEM) 1GB, which features core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. 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

In theory, the GeForce 8800 GT 256MB should be much 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 much (more or less 460%) more effective at 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 should be quite a bit (approximately 220%) faster with regards to FSAA than the Radeon HD 6450 (OEM) 1GB, and also should be capable of handling higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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