GeForce GT 240 GDDR5 vs Radeon HD 5670

Intro

Compare those specs to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this specific card. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 9 Watts (15%)

Memory Bandwidth

In theory, the Radeon HD 5670 will be 18% faster than the GeForce GT 240 GDDR5 overall, due to its higher data rate. (explain)

Radeon HD 5670		64000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 9600 (18%)

Texel Rate

The GeForce GT 240 GDDR5 will be a small bit (approximately 14%) better at AF than the Radeon HD 5670. (explain)

GeForce GT 240 GDDR5		17600 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 2100 (14%)

Pixel Rate

The Radeon HD 5670 is a lot (about 41%) better at full screen anti-aliasing than the GeForce GT 240 GDDR5, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 5670		6200 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 1800 (41%)

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 information (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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.