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GeForce GTX 550 Ti vs Radeon HD 6770

Intro

The GeForce GTX 550 Ti makes use of a 40 nm design. nVidia has set the core speed at 900 MHz. The GDDR5 RAM works at a speed of 1026 MHz on this specific card. It features 192 SPUs as well as 32 TAUs and 24 Rasterization Operator Units.

Compare those specs to the Radeon HD 6770, which has a clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 800 SPUs, 40 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 108 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 8 Watts (7%)

Memory Bandwidth

The GeForce GTX 550 Ti, in theory, should perform a lot faster than the Radeon HD 6770 overall. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 31296 (47%)

Texel Rate

The Radeon HD 6770 should be a lot (more or less 25%) better at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 6770 36000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 7200 (25%)

Pixel Rate

The GeForce GTX 550 Ti will be much (approximately 50%) faster with regards to anti-aliasing than the Radeon HD 6770, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 7200 (50%)

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 550 Ti

Amazon.com

Radeon HD 6770

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

Model GeForce GTX 550 Ti Radeon HD 6770
Manufacturer nVidia AMD
Year March 2011 January 2011
Code Name GF116 Juniper XT
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe x16
Memory 1024 MB 512 MB
Core Speed 900 MHz 900 MHz
Shader Speed 1800 MHz (N/A) MHz
Memory Speed 1026 MHz (4104 MHz effective) 1050 MHz (4200 MHz effective)
Unified Shaders 192 800
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 116 watts 108 watts
Shader Model 5.0 5.0
Bandwidth 98496 MB/sec 67200 MB/sec
Texel Rate 28800 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 14400 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Comments

8 Responses to “GeForce GTX 550 Ti vs Radeon HD 6770”
murcie says:
The Radeon HD 6770 has memory of 1024 MB not 512, as mentioned in the review.
Me says:
There's a separate 1GB version.
Subrat says:
That's true
I gb gddr5 version is available for Ati radeon hd 6770
Subrat says:
Nvidia geforce 550 ti requires Pci-e 2.0 not 2.1
Saurav says:
i want to know wheather 550ti in compaitable wth dual core processor . my mothebord's model is ASUS-P5KPL-AM-PS please help me
ghostblaster says:
the 1 gb version of the 6770 has a core speed of 850 mhz
ironphoenix says:
i just returned my radeon HD 6770 1GB and its core speed was 775 and 1000 im getting the 550 TI and its clocked for 950 and 4355
fahim says:
550ti is prefarable

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