GeForce 8800 GT 512MB vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which features a core clock frequency of 650 MHz and a DDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and uses a 40 nm design. It features 80(16x5) SPUs, 8 TAUs, 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

The GeForce 8800 GT 512MB should in theory perform 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 will be quite a bit (about 546%) better at AF 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 quite a bit (approximately 269%) more effective at AA than the Radeon HD 5450, and able to handle higher screen resolutions without slowing down too much. (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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.