GeForce GTX 660 Ti vs Radeon HD 3650 512MB

Intro

Compare those specs to the Radeon HD 3650 512MB, which comes with a core clock speed of 725 MHz and a GDDR3 memory speed of 800 MHz. It also features a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 120(24x5) SPUs, 8 TAUs, 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 Ti		150 Watts
	Difference: 72 Watts (92%)

Memory Bandwidth

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

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 118400 (463%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (more or less 1667%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 96680 (1667%)

Pixel Rate

The GeForce GTX 660 Ti is quite a bit (approximately 657%) faster with regards to FSAA than the Radeon HD 3650 512MB, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 19060 (657%)

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 largest amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.