GeForce GT 240 GDDR5 vs Radeon HD 5830

Intro

Compare those specifications to the Radeon HD 5830, which makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 1120(224x5) SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon HD 5830		175 Watts
	Difference: 105 Watts (150%)

Memory Bandwidth

The Radeon HD 5830, in theory, should be a lot faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon HD 5830		128000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 73600 (135%)

Texel Rate

The Radeon HD 5830 is much (about 155%) more effective at AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 27200 (155%)

Pixel Rate

The Radeon HD 5830 should be quite a bit (about 191%) more effective at anti-aliasing than the GeForce GT 240 GDDR5, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5830		12800 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 8400 (191%)

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 (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.