Radeon HD 3650 vs Radeon HD 5570

Intro

Compare all that to the Radeon HD 5570, which comes with GPU core speed of 650 MHz, and 512 MB of DDR3 RAM running at 900 MHz through a 128-bit bus. It also is comprised of 400(80x5) Stream Processors, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570		43 Watts
Radeon HD 3650		78 Watts
	Difference: 35 Watts (81%)

Memory Bandwidth

Theoretically, the Radeon HD 5570 should perform a little bit faster than the Radeon HD 3650 overall. (explain)

Radeon HD 5570		28800 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 3200 (13%)

Texel Rate

The Radeon HD 5570 should be a lot (more or less 124%) better at anisotropic filtering than the Radeon HD 3650. (explain)

Radeon HD 5570		13000 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 7200 (124%)

Pixel Rate

The Radeon HD 5570 should be a lot (more or less 79%) faster with regards to full screen anti-aliasing than the Radeon HD 3650, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 5570		5200 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 2300 (79%)

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 maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 get to the maximum fill rate.