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GeForce GTX 660 Ti vs Radeon HD 7850

Intro

The GeForce GTX 660 Ti comes with a GPU clock speed of 915 MHz, and the 2048 MB of GDDR5 RAM runs at 1500 MHz through a 192-bit bus. It also is comprised of 1344 Stream Processors, 112 TAUs, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 7850, which comes with a GPU core clock speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also features 1024 Stream Processors, 64 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
GeForce GTX 660 Ti 150 Watts
Difference: 20 Watts (15%)

Memory Bandwidth

Theoretically, the Radeon HD 7850 should be a little bit faster than the GeForce GTX 660 Ti in general. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GTX 660 Ti 144000 MB/sec
Difference: 9600 (7%)

Texel Rate

The GeForce GTX 660 Ti will be a lot (about 86%) better at anisotropic filtering than the Radeon HD 7850. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 47440 (86%)

Pixel Rate

The Radeon HD 7850 will be much (about 25%) more effective at full screen anti-aliasing than the GeForce GTX 660 Ti, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GTX 660 Ti 21960 Mpixels/sec
Difference: 5560 (25%)

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

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GeForce GTX 660 Ti

Amazon.com

Radeon HD 7850

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 660 Ti Radeon HD 7850
Manufacturer nVidia AMD
Year August 2012 March 2012
Code Name GK104 Pitcairn Pro
Memory 2048 MB 2048 MB
Core Speed 915 MHz 860 MHz
Memory Speed 6000 MHz 4800 MHz
Power (Max TDP) 150 watts 130 watts
Bandwidth 144000 MB/sec 153600 MB/sec
Texel Rate 102480 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 21960 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1344 1024
Texture Mapping Units 112 64
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Comments

6 Responses to “GeForce GTX 660 Ti vs Radeon HD 7850”
Wanna Buy new desktop - Page 4 - Tech Support Forums - TechIMO.com says:

[...] Hey just wondering about the 660 Ti and whether or not it has been released it appears that it has but not exactly sure and in terms of price etc is it worth it instead of the 7850. I've had to post pone my build until after Christmas Uni has made me a bit poorer than I anticipated so by then hopefully the 7850 may have dropped in price as a counter towards the 660 Ti. I've also been using this website as a comparison for graphics cards would you say it's fairly accurate: GeForce GTX 660 Ti vs Radeon HD 7850 – Performance Comparison Benchmarks @ Hardware Compare [...]

filhodaputabr! says:

Chupa ati! porra! vão tomar no cú , eu sei fazer uma picarreta!

BR anywhare says:

Será que uma das duas roda meu tíbia?

comedor do filhodaputabr says:

teu cu fdp a hd 7850 só perdeu taxel rate e vai comparar os preços das 2 seu otário fanboióla da nvidia

ronron says:

the 7850 is better for me.. ....thus the memory bandwidth is 256bit..ive seen the 660ti and its not worth the money the 7850 can run as fast as the 660ti but and also worth every penny ...

billchraw says:

a7850 e supeiror seu urro alha de novo o principal o o ultimo i ela ta na frente

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