GeForce GT 240 GDDR5 1GB vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which features GPU core speed of 800 MHz, and 1536 MB of GDDR5 memory set to run at 1250 MHz through a 384-bit bus. It also features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon HD 7950		200 Watts
	Difference: 130 Watts (186%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 should in theory be a lot superior to the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon HD 7950		240000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 185600 (341%)

Texel Rate

The Radeon HD 7950 should be quite a bit (more or less 409%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon HD 7950		89600 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 72000 (409%)

Pixel Rate

The Radeon HD 7950 will be much (more or less 482%) more effective at FSAA than the GeForce GT 240 GDDR5 1GB, and also able to handle higher resolutions more effectively. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.