GeForce 8800 GT 512MB vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which features a GPU core clock speed of 650 MHz, and 512 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce 8800 GT 512MB		105 Watts
	Difference: 86 Watts (453%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GT 512MB should be much faster than the Radeon HD 5450 in general. (explain)

GeForce 8800 GT 512MB		57600 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 44800 (350%)

Texel Rate

The GeForce 8800 GT 512MB should be quite a bit (about 546%) faster with regards to texture filtering than the Radeon HD 5450. (explain)

GeForce 8800 GT 512MB		33600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 28400 (546%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 8800 GT 512MB is the winner, by a large margin. (explain)

GeForce 8800 GT 512MB		9600 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 7000 (269%)

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 data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.