GeForce GTX 750 Ti vs Radeon HD 5550

Intro

Compare those specs to the Radeon HD 5550, which has a core clock frequency of 550 MHz and a DDR2 memory frequency of 400 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 750 Ti should theoretically be quite a bit better than 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 should be quite a bit (more or less 364%) faster with regards to texture 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%) faster with regards to AA than the Radeon HD 5550, and will be able to handle higher resolutions better. (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 maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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