Radeon HD 5450 vs Radeon HD 6850

Intro

Compare that to the Radeon HD 6850, which comes with clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs as well as 48 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 6850		127 Watts
	Difference: 108 Watts (568%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6850 should be quite a bit faster than the Radeon HD 5450 in general. (explain)

Radeon HD 6850		128000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 115200 (900%)

Texel Rate

The Radeon HD 6850 should be much (about 615%) more effective at AF than the Radeon HD 5450. (explain)

Radeon HD 6850		37200 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 32000 (615%)

Pixel Rate

The Radeon HD 6850 will be quite a bit (more or less 854%) more effective at FSAA than the Radeon HD 5450, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 6850		24800 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 22200 (854%)

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 largest amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.