Radeon HD 3650 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 RAM set to run at 800 MHz through a 64-bit bus. It also features 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)		31 Watts
Radeon HD 3650		78 Watts
	Difference: 47 Watts (152%)

Memory Bandwidth

The Radeon HD 3650 should in theory perform quite a bit faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 3650		25600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 12800 (100%)

Texel Rate

The Radeon HD 3650 will be a small bit (approximately 16%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3650		5800 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 800 (16%)

Pixel Rate

The Radeon HD 3650 is a little bit (about 16%) more effective at full screen anti-aliasing than the Radeon HD 6450 (OEM), and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 3650		2900 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 400 (16%)

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 MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. 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 bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.