Radeon HD 5750 1GB vs Radeon HD 6450 (OEM)

Intro

Compare all that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this particular model. It features 160 SPUs as well as 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 5750 1GB		86 Watts
	Difference: 55 Watts (177%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 1GB should theoretically be much superior to the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 60800 (475%)

Texel Rate

The Radeon HD 5750 1GB should be quite a bit (more or less 404%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 20200 (404%)

Pixel Rate

The Radeon HD 5750 1GB should be much (about 348%) better at full screen anti-aliasing than the Radeon HD 6450 (OEM), and should be capable of handling higher resolutions better. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 8700 (348%)

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 (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.