Radeon HD 5450 vs Radeon HD 6670 (OEM)

Intro

Compare that to the Radeon HD 6670 (OEM), which makes use of a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular model. It features 480 SPUs as well as 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 6670 (OEM)		63 Watts
	Difference: 44 Watts (232%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) should in theory be quite a bit superior to the Radeon HD 5450 in general. (explain)

Radeon HD 6670 (OEM)		64000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6670 (OEM) is quite a bit (approximately 269%) better at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 6670 (OEM)		19200 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 14000 (269%)

Pixel Rate

The Radeon HD 6670 (OEM) is quite a bit (about 146%) more effective at FSAA than the Radeon HD 5450, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 6670 (OEM)		6400 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 3800 (146%)

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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.