GeForce GTX 660 vs Radeon HD 3650 256MB

Intro

Compare all of that to the Radeon HD 3650 256MB, which features a clock frequency of 725 MHz and a DDR2 memory frequency of 800 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It features 120(24x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 256MB		78 Watts
GeForce GTX 660		140 Watts
	Difference: 62 Watts (79%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should be 463% quicker than the Radeon HD 3650 256MB in general, because of its greater bandwidth. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 118592 (463%)

Texel Rate

The GeForce GTX 660 should be much (about 1252%) faster with regards to anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 72600 (1252%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is a better choice, and very much so. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 20620 (711%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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