Radeon HD 3850 1GB vs Radeon HD 6570 (OEM) 1GB

Intro

Compare that to the Radeon HD 6570 (OEM) 1GB, which features a clock frequency of 650 MHz and a GDDR3 memory frequency of 900 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB		50 Watts
Radeon HD 3850 1GB		75 Watts
	Difference: 25 Watts (50%)

Memory Bandwidth

Performance-wise, the Radeon HD 3850 1GB should theoretically be a lot superior to the Radeon HD 6570 (OEM) 1GB in general. (explain)

Radeon HD 3850 1GB		52992 MB/sec
Radeon HD 6570 (OEM) 1GB		28800 MB/sec
	Difference: 24192 (84%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB should be a lot (approximately 46%) faster with regards to anisotropic filtering than the Radeon HD 3850 1GB. (explain)

Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 4912 (46%)

Pixel Rate

The Radeon HD 3850 1GB will be much (more or less 106%) more effective at anti-aliasing than the Radeon HD 6570 (OEM) 1GB, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 3850 1GB		10688 Mpixels/sec
Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
	Difference: 5488 (106%)

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 (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should 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 anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.