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GeForce GTX 550 Ti vs Radeon HD 7770

Intro

The GeForce GTX 550 Ti comes with core speeds of 900 MHz on the GPU, and 1026 MHz on the 1024 MB of GDDR5 RAM. It features 192 SPUs along with 32 TAUs and 24 ROPs.

Compare that to the Radeon HD 7770, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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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 much 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 quite a bit (more or less 39%) more effective at AF 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

If running with high levels of AA is important to you, then the GeForce GTX 550 Ti is a better choice, and very much so. (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

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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

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Model GeForce GTX 550 Ti Radeon HD 7770
Manufacturer nVidia AMD
Year March 2011 February 2012
Code Name GF116 Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Memory Speed 4104 MHz 4500 MHz
Power (Max TDP) 116 watts 80 watts
Bandwidth 98496 MB/sec 72000 MB/sec
Texel Rate 28800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 192 640
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1170 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max 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.

what are the factors must consider 1st before buying a VC? - Page 3 says:

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Which modern GPU to completely max out games on an old monitor (1280*1024x60Hz)? - Page 2 says:

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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 [...]

Huge custom computer building thread - Page 3 - XboxMB - Xbox Message Boards says:

[...] 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:

This site is fake.

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