GeForce GT 240 GDDR5 1GB vs Radeon HD 4730

Intro

Compare those specs to the Radeon HD 4730, which has clock speeds of 700 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon HD 4730		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4730 should be a small bit faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon HD 4730		57600 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4730 will be quite a bit (about 27%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon HD 4730		22400 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 4800 (27%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4730 is the winner, by far. (explain)

Radeon HD 4730		5600 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 1200 (27%)

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 max amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.