Radeon HD 5450 vs Radeon HD 6950

Intro

Compare that to the Radeon HD 6950, which has GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 1408 Stream Processors, 88 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 6950		200 Watts
	Difference: 181 Watts (953%)

Memory Bandwidth

The Radeon HD 6950 should theoretically perform a lot faster than the Radeon HD 5450 in general. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 147200 (1150%)

Texel Rate

The Radeon HD 6950 will be a lot (approximately 1254%) faster with regards to AF than the Radeon HD 5450. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 65200 (1254%)

Pixel Rate

The Radeon HD 6950 is much (about 885%) better at anti-aliasing than the Radeon HD 5450, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 23000 (885%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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