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GeForce GTX 550 Ti vs Radeon HD 7770

Intro

The GeForce GTX 550 Ti comes with a GPU core clock speed of 900 MHz, and the 1024 MB of GDDR5 memory is set to run at 1026 MHz through a 192-bit bus. It also is made up of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.

Compare all of that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory is set to run at a speed of 1125 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

(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

Theoretically speaking, the GeForce GTX 550 Ti should be 37% faster than the Radeon HD 7770 overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon HD 7770 should be much (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

If running with a high screen resolution 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

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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory 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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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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