Radeon HD 5750 512MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare all that to the Radeon HD 6450 (OEM) 1GB, which features a core clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 64-bit memory bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

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 512MB		86 Watts
	Difference: 55 Watts (177%)

Memory Bandwidth

Theoretically, the Radeon HD 5750 512MB should perform a lot faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 44800 (156%)

Texel Rate

The Radeon HD 5750 512MB will be quite a bit (more or less 320%) faster with regards to texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 19200 (320%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5750 512MB is superior to the Radeon HD 6450 (OEM) 1GB, by a large margin. (explain)

Radeon HD 5750 512MB		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 maximum amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher 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 amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.