GeForce GT 240 GDDR5 1GB vs Radeon HD 5450

Intro

Compare that to the Radeon HD 5450, which comes with a core clock frequency of 650 MHz and a DDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and makes use of a 40 nm design. It is comprised of 80(16x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GT 240 GDDR5 1GB		70 Watts
	Difference: 51 Watts (268%)

Memory Bandwidth

In theory, the GeForce GT 240 GDDR5 1GB will be 325% quicker than the Radeon HD 5450 in general, due to its higher bandwidth. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 41600 (325%)

Texel Rate

The GeForce GT 240 GDDR5 1GB should be much (approximately 238%) more effective at texture filtering than the Radeon HD 5450. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 12400 (238%)

Pixel Rate

The GeForce GT 240 GDDR5 1GB will be quite a bit (more or less 69%) faster with regards to AA than the Radeon HD 5450, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 1800 (69%)

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 across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.