Radeon HD 3850 512MB vs Radeon HD 6450 (OEM)

Intro

Compare those specifications to the Radeon HD 6450 (OEM), which has GPU clock speed of 625 MHz, and 512 MB of GDDR3 RAM set to run at 800 MHz through a 64-bit bus. It also is comprised of 160 Stream Processors, 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 3850 512MB		75 Watts
	Difference: 44 Watts (142%)

Memory Bandwidth

Performance-wise, the Radeon HD 3850 512MB should in theory be quite a bit superior to the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 3850 512MB		52992 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 40192 (314%)

Texel Rate

The Radeon HD 3850 512MB will be quite a bit (more or less 114%) faster with regards to AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3850 512MB		10688 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 5688 (114%)

Pixel Rate

The Radeon HD 3850 512MB should be quite a bit (more or less 328%) better at anti-aliasing than the Radeon HD 6450 (OEM), and capable of handling higher resolutions while still performing well. (explain)

Radeon HD 3850 512MB		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 data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.