GeForce GTX 750 Ti vs Radeon HD 5550

Intro

Compare those specifications to the Radeon HD 5550, which uses a 40 nm design. AMD has clocked the core speed at 550 MHz. The DDR2 memory works at a speed of 400 MHz on this model. It features 320(64x5) SPUs as well as 16 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 750 Ti should theoretically be quite a bit superior to the Radeon HD 5550 in general. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 73600 (575%)

Texel Rate

The GeForce GTX 750 Ti will be much (about 364%) more effective at anisotropic filtering than the Radeon HD 5550. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 32000 (364%)

Pixel Rate

The GeForce GTX 750 Ti will be quite a bit (more or less 271%) better at full screen anti-aliasing than the Radeon HD 5550, and also able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 11920 (271%)

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: Bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.