Radeon HD 4730 vs Radeon HD 6450 (OEM)

Intro

Compare those specs to the Radeon HD 6450 (OEM), which comes with a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 memory running at 800 MHz through a 64-bit bus. It also is made up of 160 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 4730		140 Watts
	Difference: 109 Watts (352%)

Memory Bandwidth

In theory, the Radeon HD 4730 will be 350% faster than the Radeon HD 6450 (OEM) overall, due to its higher data rate. (explain)

Radeon HD 4730		57600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 44800 (350%)

Texel Rate

The Radeon HD 4730 will be quite a bit (approximately 348%) faster with regards to AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 4730		22400 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 17400 (348%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 4730 is the winner, by far. (explain)

Radeon HD 4730		5600 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 3100 (124%)

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 largest amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number 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 rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.