GeForce GT 240 GDDR5 vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs as well as 112 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 7950 3GB		200 Watts
	Difference: 130 Watts (186%)

Memory Bandwidth

Theoretically, the Radeon HD 7950 3GB should perform much faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 185600 (341%)

Texel Rate

The Radeon HD 7950 3GB is much (more or less 409%) more effective at texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 72000 (409%)

Pixel Rate

The Radeon HD 7950 3GB will be much (more or less 482%) more effective at FSAA than the GeForce GT 240 GDDR5, and also able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 21200 (482%)

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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.