GeForce GTX 660 vs Radeon HD 3650 512MB

Intro

Compare all that to the Radeon HD 3650 512MB, which has a core clock frequency of 725 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It features 120(24x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

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, the GeForce GTX 660 should perform much faster than the Radeon HD 3650 512MB in general. (explain)

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

Texel Rate

The GeForce GTX 660 is quite a bit (more or less 1252%) faster with regards to AF 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 (about 711%) better at AA than the Radeon HD 3650 512MB, and will be capable of handling higher screen resolutions more effectively. (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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock 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 number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.