Radeon HD 4350 vs Radeon HD 5450

Intro

Compare those specifications to the Radeon HD 5450, which makes use of a 40 nm design. AMD has set the core frequency at 650 MHz. The DDR3 RAM is set to run at a frequency of 800 MHz on this model. It features 80(16x5) SPUs as well as 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 4350		22 Watts
	Difference: 3 Watts (16%)

Memory Bandwidth

The Radeon HD 5450 should in theory perform much faster than the Radeon HD 4350 in general. (explain)

Radeon HD 5450		12800 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 4800 (60%)

Texel Rate

The Radeon HD 5450 should be just a bit (approximately 13%) more effective at anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 5450		5200 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 600 (13%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5450 is the winner, not by a very large margin though. (explain)

Radeon HD 5450		2600 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 300 (13%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should 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 anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of 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 colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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.