GeForce GTX 580 3GB vs Radeon HD 5450

Intro

Compare those specs to the Radeon HD 5450, which features a clock frequency of 650 MHz and a DDR3 memory speed of 800 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It is comprised of 80(16x5) SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 225 Watts (1184%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 3GB should perform much faster than the Radeon HD 5450 in general. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 179584 (1403%)

Texel Rate

The GeForce GTX 580 3GB will be a lot (approximately 850%) faster with regards to AF than the Radeon HD 5450. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 44208 (850%)

Pixel Rate

The GeForce GTX 580 3GB should be much (more or less 1325%) faster with regards to anti-aliasing than the Radeon HD 5450, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 34456 (1325%)

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 (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at 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 video 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 card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.