Radeon HD 5450 vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which has GPU core speed of 925 MHz, and 3072 MB of GDDR5 memory running at 1375 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 7970		250 Watts
	Difference: 231 Watts (1216%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should theoretically be quite a bit superior to the Radeon HD 5450 in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 251200 (1963%)

Texel Rate

The Radeon HD 7970 is a lot (more or less 2177%) better at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 113200 (2177%)

Pixel Rate

The Radeon HD 7970 is much (about 1038%) faster with regards to FSAA than the Radeon HD 5450, and will be able to handle higher screen resolutions better. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 27000 (1038%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better 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 record to the local memory per second - measured in millions of pixels per second. The number is worked out 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 filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.