GeForce GTX 660 Ti vs Radeon HD 3690/3830

Intro

Compare all that to the Radeon HD 3690/3830, which features a core clock frequency of 668 MHz and a GDDR3 memory frequency of 828 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti will be 443% quicker than the Radeon HD 3690/3830 in general, due to its greater bandwidth. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 117504 (443%)

Texel Rate

The GeForce GTX 660 Ti should be a lot (more or less 859%) better at anisotropic filtering than the Radeon HD 3690/3830. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 91792 (859%)

Pixel Rate

The GeForce GTX 660 Ti is quite a bit (about 105%) faster with regards to anti-aliasing than the Radeon HD 3690/3830, and should be able to handle higher resolutions better. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 11272 (105%)

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 maximum amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 potential to reach the max fill rate.