GeForce GT 240 GDDR5 1GB vs Radeon HD 4550 512MB

Intro

Compare that to the Radeon HD 4550 512MB, which uses a 55 nm design. AMD has set the core frequency at 600 MHz. The GDDR3 RAM works at a frequency of 800 MHz on this card. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
GeForce GT 240 GDDR5 1GB		70 Watts
	Difference: 45 Watts (180%)

Memory Bandwidth

As far as performance goes, the GeForce GT 240 GDDR5 1GB should theoretically be quite a bit better than the Radeon HD 4550 512MB in general. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 41600 (325%)

Texel Rate

The GeForce GT 240 GDDR5 1GB will be quite a bit (about 267%) faster with regards to anisotropic filtering than the Radeon HD 4550 512MB. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 12800 (267%)

Pixel Rate

The GeForce GT 240 GDDR5 1GB will be quite a bit (about 83%) faster with regards to full screen anti-aliasing than the Radeon HD 4550 512MB, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 2000 (83%)

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 largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.