GeForce GTX 660 Ti vs Radeon HD 5850

Intro

Compare all of that to the Radeon HD 5850, which has a core clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is comprised of 1440(288x5) SPUs, 72 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon HD 5850		151 Watts
	Difference: 1 Watts (1%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti should be 13% quicker than the Radeon HD 5850 overall, due to its greater data rate. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 5850		128000 MB/sec
	Difference: 16000 (13%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (more or less 96%) better at AF than the Radeon HD 5850. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 5850		52200 Mtexels/sec
	Difference: 50280 (96%)

Pixel Rate

The Radeon HD 5850 will be a bit (about 6%) better at FSAA than the GeForce GTX 660 Ti, and will be capable of handling higher screen resolutions better. (explain)

Radeon HD 5850		23200 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 1240 (6%)

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 moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.