GeForce GTX 660 Ti vs Radeon HD 5550

Intro

Compare all that to the Radeon HD 5550, which has GPU core speed of 550 MHz, and 512 MB of DDR2 RAM set to run at 400 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 16 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 660 Ti is 1025% quicker than the Radeon HD 5550 overall, due to its greater bandwidth. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 131200 (1025%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (about 1065%) more effective at AF than the Radeon HD 5550. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 93680 (1065%)

Pixel Rate

The GeForce GTX 660 Ti will be a lot (more or less 399%) better at full screen anti-aliasing than the Radeon HD 5550, and also will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 17560 (399%)

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 maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour 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 quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.