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GeForce GTX 550 Ti vs Radeon HD 7770

Intro

The GeForce GTX 550 Ti has a GPU clock speed of 900 MHz, and the 1024 MB of GDDR5 RAM runs at 1026 MHz through a 192-bit bus. It also is comprised of 192 Stream Processors, 32 Texture Address Units, and 24 ROPs.

Compare all that to the Radeon HD 7770, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce GTX 550 Ti 116 Watts
Difference: 36 Watts (45%)

Memory Bandwidth

The GeForce GTX 550 Ti should theoretically be quite a bit faster than the Radeon HD 7770 overall. (explain)

GeForce GTX 550 Ti 98496 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 26496 (37%)

Texel Rate

The Radeon HD 7770 will be a lot (more or less 39%) better at texture filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 11200 (39%)

Pixel Rate

The GeForce GTX 550 Ti is quite a bit (more or less 35%) better at anti-aliasing than the Radeon HD 7770, and also will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 7770 16000 Mpixels/sec
Difference: 5600 (35%)

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 7770

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 7770
Manufacturer nVidia AMD
Year March 2011 February 2012
Code Name GF116 Cape Verde XT
Fab Process 40 nm 28 nm
Bus PCIe 2.1 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Shader Speed 1800 MHz (N/A) MHz
Memory Speed 1026 MHz (4104 MHz effective) 1125 MHz (4500 MHz effective)
Unified Shaders 192 640
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 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 116 watts 80 watts
Shader Model 5.0 5.0
Bandwidth 98496 MB/sec 72000 MB/sec
Texel Rate 28800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be applied per second. This figure 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Comments

8 Responses to “GeForce GTX 550 Ti vs Radeon HD 7770”
jony says:
i am a IT professional, personally i am a sales person in computer company, to convince my customer i all ways visit this side to make there right choice.
Loren says:
Sometimes this site passes wrong information that very harmful for everyone :(
mrhiab says:
Hey Joni...you might be AN IT Professional. However your desecration of the English language is astonishing.
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[...] use these ati things and they loss performance with every new game besid compare 550ti with 7770 : GeForce GTX 550 Ti vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare nvida 11000/rs cost card can defeat single handed ati 13.7k card 550ti price Graphic Cards - [...]
Anonymous says:
[...] no me hagais sentir mal x la compra de la gtx550 k la asus hd7770 ya no estaba xD GeForce GTX 550 Ti vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare que es el texel rate? xD segun e leido es algo de cantidad de pixeles en 3d o algo asi no me [...]
[...] at you but I'd think a little bit before you try to show me up. I built that build to be cheap. GeForce GTX 550 Ti vs Radeon HD 7770 – Performance Comparison Benchmarks @ Hardware Compare The GTX 550 TI is theoretically better. But since you would like to go the AMD video card, for the [...]
Anonymous says:
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