Radeon HD 3650 vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which comes with clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 122 Watts (156%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 2GB will be 525% faster than the Radeon HD 3650 overall, due to its greater bandwidth. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 134400 (525%)

Texel Rate

The Radeon HD 6950 2GB should be much (approximately 1114%) faster with regards to AF than the Radeon HD 3650. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 64600 (1114%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is superior to the Radeon HD 3650, and very much so. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 22700 (783%)

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 (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 number of pixels that the graphics chip could possibly record to its 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 ability to get to the maximum fill rate.