Radeon HD 3650 512MB vs Radeon HD 6570 (OEM) 2GB

Intro

Compare all that to the Radeon HD 6570 (OEM) 2GB, which uses a 40 nm design. AMD has set the core frequency at 650 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this particular card. It features 480 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 28 Watts (56%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6570 (OEM) 2GB should theoretically be much better than the Radeon HD 3650 512MB in general. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 38400 (150%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB will be quite a bit (more or less 169%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 9800 (169%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB is much (more or less 79%) better at AA than the Radeon HD 3650 512MB, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
Radeon HD 3650 512MB		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 max amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 in one second. This number is calculated by multiplying the total texture units of the card by the core clock 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 one second.

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