Radeon HD 3690/3830 vs Radeon HD 6570 (OEM) 2GB

Intro

Compare those specifications to the Radeon HD 6570 (OEM) 2GB, which makes use of a 40 nm design. AMD has clocked the core frequency at 650 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this specific model. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
Radeon HD 3690/3830		75 Watts
	Difference: 25 Watts (50%)

Memory Bandwidth

Performance-wise, the Radeon HD 6570 (OEM) 2GB should theoretically be quite a bit better than the Radeon HD 3690/3830 overall. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 37504 (142%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be much (more or less 46%) faster with regards to anisotropic filtering than the Radeon HD 3690/3830. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 4912 (46%)

Pixel Rate

The Radeon HD 3690/3830 should be much (more or less 106%) more effective at full screen anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.