Radeon HD 3850 1GB vs Radeon HD 6450 (OEM)

Intro

Compare that to the Radeon HD 6450 (OEM), which comes with clock speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 160 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 3850 1GB		75 Watts
	Difference: 44 Watts (142%)

Memory Bandwidth

Theoretically, the Radeon HD 3850 1GB should be a lot faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 3850 1GB		52992 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 40192 (314%)

Texel Rate

The Radeon HD 3850 1GB is much (about 114%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3850 1GB		10688 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 5688 (114%)

Pixel Rate

The Radeon HD 3850 1GB should be quite a bit (approximately 328%) more effective at anti-aliasing than the Radeon HD 6450 (OEM), and also capable of handling higher resolutions more effectively. (explain)

Radeon HD 3850 1GB		10688 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 8188 (328%)

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 transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 amount of texture map elements (texels) that are applied 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 higher the texel rate, the better the graphics card will be at handling 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 the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.