GeForce GT 450 (OEM) vs Radeon HD 4550 512MB

Intro

Compare all that to the Radeon HD 4550 512MB, which features core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 80(16x5) 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 4550 512MB		25 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 81 Watts (324%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) will be 650% quicker than the Radeon HD 4550 512MB in general, due to its greater bandwidth. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The GeForce GT 450 (OEM) should be much (approximately 295%) better at texture filtering than the Radeon HD 4550 512MB. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 14160 (295%)

Pixel Rate

The GeForce GT 450 (OEM) should be much (more or less 690%) better at anti-aliasing than the Radeon HD 4550 512MB, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 16560 (690%)

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 information (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 interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better 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 most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the max fill rate.