Geforce GTX 680 vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which has GPU core speed of 650 MHz, and 512 MB of DDR3 memory set to run at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Geforce GTX 680		195 Watts
	Difference: 176 Watts (926%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 680 should theoretically be quite a bit superior to the Radeon HD 5450 overall. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 179456 (1402%)

Texel Rate

The Geforce GTX 680 should be quite a bit (more or less 2376%) more effective at texture filtering than the Radeon HD 5450. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 123568 (2376%)

Pixel Rate

The Geforce GTX 680 is a lot (approximately 1138%) faster with regards to anti-aliasing than the Radeon HD 5450, and also should be able to handle higher resolutions more effectively. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 29592 (1138%)

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 MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.