GeForce GT 240 GDDR5 vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which comes with clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs as well as 56 TAUs and 32 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 6870		151 Watts
	Difference: 81 Watts (116%)

Memory Bandwidth

In theory, the Radeon HD 6870 should be 147% faster than the GeForce GT 240 GDDR5 in general, because of its higher data rate. (explain)

Radeon HD 6870		134400 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 80000 (147%)

Texel Rate

The Radeon HD 6870 is much (approximately 186%) better at AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 6870		50400 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 32800 (186%)

Pixel Rate

The Radeon HD 6870 will be much (more or less 555%) more effective at AA than the GeForce GT 240 GDDR5, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6870		28800 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 24400 (555%)

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 maximum amount of information (counted in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.