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GeForce GTX 660 Ti vs Radeon HD 7850

Intro

The GeForce GTX 660 Ti comes with a clock frequency of 915 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 192-bit memory bus, and uses a 28 nm design. It features 1344 SPUs, 112 TAUs, and 24 ROPs.

Compare those specifications to the Radeon HD 7850, which makes use of a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this particular model. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

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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 6010 points
Radeon HD 7850 5200 points
Difference: 810 (16%)

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

Performance-wise, the Radeon HD 7850 should theoretically be just a bit better than the GeForce GTX 660 Ti overall. (explain)

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

Texel Rate

The GeForce GTX 660 Ti should be a lot (more or less 86%) better at texture 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

If using a high screen resolution is important to you, then the Radeon HD 7850 is a better choice, by a large margin. (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

GeForce GTX 660 Ti

Radeon HD 7850

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 information (measured in MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

GeForce GTX 660 Ti

Radeon HD 7850

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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