GeForce GTX 660 Ti vs Radeon HD 6850

Intro

Compare all that to the Radeon HD 6850, which uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 memory works at a speed of 1000 MHz on this particular card. It features 960 SPUs as well as 48 TAUs and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 660 Ti		6013 points
Radeon HD 6850		2395 points
	Difference: 3618 (151%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850		127 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 23 Watts (18%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 Ti should in theory be just a bit superior to the Radeon HD 6850 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 6850		128000 MB/sec
	Difference: 16000 (13%)

Texel Rate

The GeForce GTX 660 Ti will be quite a bit (approximately 175%) better at texture filtering than the Radeon HD 6850. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 65280 (175%)

Pixel Rate

The Radeon HD 6850 should be just a bit (about 13%) more effective at FSAA than the GeForce GTX 660 Ti, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6850		24800 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 2840 (13%)

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 max amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out 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 outputting the pixels (image) to 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.