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

Intro

Compare that to the Radeon HD 6450 (OEM) 1GB, which uses a 40 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this specific card. 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) 1GB		31 Watts
Radeon HD 5750 1GB		86 Watts
	Difference: 55 Watts (177%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 1GB should in theory be a lot better than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 44800 (156%)

Texel Rate

The Radeon HD 5750 1GB will be quite a bit (approximately 320%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 19200 (320%)

Pixel Rate

The Radeon HD 5750 1GB will be quite a bit (approximately 273%) faster with regards to AA than the Radeon HD 6450 (OEM) 1GB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 5750 1GB		11200 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 8200 (273%)

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 megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 output 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 ability to reach the maximum fill rate.