GeForce GTX 660 vs Radeon HD 3650 512MB

Intro

Compare that to the Radeon HD 3650 512MB, which features GPU clock speed of 725 MHz, and 512 MB of GDDR3 memory set to run at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) Stream Processors, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
GeForce GTX 660		140 Watts
	Difference: 62 Watts (79%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 should be quite a bit faster than the Radeon HD 3650 512MB overall. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 118592 (463%)

Texel Rate

The GeForce GTX 660 will be quite a bit (more or less 1252%) better at texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 72600 (1252%)

Pixel Rate

The GeForce GTX 660 should be quite a bit (approximately 711%) faster with regards to anti-aliasing than the Radeon HD 3650 512MB, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 3650 512MB		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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one 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 this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.