GeForce GTX 550 Ti vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which has a core clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		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 quite a bit better than the Radeon HD 5770 in general. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 21696 (28%)

Texel Rate

The Radeon HD 5770 is a bit (approximately 18%) better at anisotropic filtering than the GeForce GTX 550 Ti. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 5200 (18%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 550 Ti is superior to the Radeon HD 5770, by far. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 8000 (59%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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