Geforce GTX 680 vs Radeon HD 5450

Intro

Compare all that to the Radeon HD 5450, which uses a 40 nm design. AMD has set the core frequency at 650 MHz. The DDR3 memory is set to run at a speed of 800 MHz on this specific model. It features 80(16x5) SPUs along with 8 TAUs 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

In theory, the Geforce GTX 680 should be a lot faster than the Radeon HD 5450 in general. (explain)

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

Texel Rate

The Geforce GTX 680 is a lot (approximately 2376%) better 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 (about 1138%) faster with regards to AA than the Radeon HD 5450, and will be capable of handling higher resolutions without slowing down too much. (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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core 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 can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.