GeForce GT 240 GDDR5 1GB vs Radeon HD 4730

Intro

Compare those specifications to the Radeon HD 4730, which features a core clock speed of 700 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 8 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 4730		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

In theory, the Radeon HD 4730 is 6% faster than the GeForce GT 240 GDDR5 1GB overall, due to its greater bandwidth. (explain)

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

Texel Rate

The Radeon HD 4730 is a lot (more or less 27%) better at texture filtering 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

The Radeon HD 4730 will be quite a bit (about 27%) faster with regards to anti-aliasing than the GeForce GT 240 GDDR5 1GB, and able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.