Radeon HD 3850 256MB vs Radeon HD 6450 (OEM)

Intro

Compare those specs to the Radeon HD 6450 (OEM), which features a core clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 64-bit bus, and uses a 40 nm design. It is comprised 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)		31 Watts
Radeon HD 3850 256MB		75 Watts
	Difference: 44 Watts (142%)

Memory Bandwidth

Theoretically, the Radeon HD 3850 256MB should perform a lot faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 3850 256MB		52992 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 40192 (314%)

Texel Rate

The Radeon HD 3850 256MB will be a lot (about 114%) faster with regards to texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3850 256MB		10688 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 5688 (114%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 3850 256MB is a better choice, by a large margin. (explain)

Radeon HD 3850 256MB		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 largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If 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 high 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 by the core speed of the chip. The better this number, the better the video 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 card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.