GeForce 8800 GT 512MB vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which makes use of a 40 nm design. AMD has clocked the core speed at 650 MHz. The DDR3 RAM runs at a speed of 800 MHz on this specific model. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

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

In theory, the GeForce 8800 GT 512MB should be 350% faster than the Radeon HD 5450 in general, because of its greater data rate. (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 a lot (approximately 546%) better at anisotropic 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

The GeForce 8800 GT 512MB is much (approximately 269%) more effective at AA than the Radeon HD 5450, and should be able to handle higher resolutions more effectively. (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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video 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 maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.