Radeon HD 5450 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which features a core clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 384-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 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 7950		200 Watts
	Difference: 181 Watts (953%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 should be quite a bit faster than the Radeon HD 5450 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 227200 (1775%)

Texel Rate

The Radeon HD 7950 will be a lot (approximately 1623%) faster with regards to AF than the Radeon HD 5450. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 84400 (1623%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 is a better choice, by far. (explain)

Radeon HD 7950		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 (counted in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 in one second. This number is calculated by multiplying the total number of texture units 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.