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GeForce GTX 550 Ti vs Radeon HD 6770

Intro

The GeForce GTX 550 Ti has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also features a 192-bit memory bus, and uses a 40 nm design. It is made up of 192 SPUs, 32 Texture Address Units, and 24 ROPs.

Compare those specs to the Radeon HD 6770, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this specific model. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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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 550 Ti		1897 points
Radeon HD 6770		1520 points
	Difference: 377 (25%)

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

As far as performance goes, the GeForce GTX 550 Ti should in theory be a lot better 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 will be much (more or less 25%) better at AF 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

If running with high levels of AA is important to you, then the GeForce GTX 550 Ti is a better choice, by a large margin. (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

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GeForce GTX 550 Ti

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Radeon HD 6770

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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 550 Ti	Radeon HD 6770
Manufacturer	nVidia	AMD
Year	March 2011	January 2011
Code Name	GF116	Juniper XT
Memory	1024 MB	512 MB
Core Speed	900 MHz	900 MHz
Memory Speed	4104 MHz	4200 MHz
Power (Max TDP)	116 watts	108 watts
Bandwidth	98496 MB/sec	67200 MB/sec
Texel Rate	28800 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	21600 Mpixels/sec	14400 Mpixels/sec
Unified Shaders	192	800
Texture Mapping Units	32	40
Render Output Units	24	16
Bus Type	GDDR5	GDDR5
Bus Width	192-bit	128-bit
Fab Process	40 nm	40 nm
Transistors	1170 million	1040 million
Bus	PCIe 2.1 x16	PCIe x16
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

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