GeForce GTX 750 vs Radeon HD 4550 512MB

Intro

Compare all that to the Radeon HD 4550 512MB, which features GPU core speed of 600 MHz, and 512 MB of GDDR3 RAM set to run at 800 MHz through a 64-bit bus. It also is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
GeForce GTX 750		55 Watts
	Difference: 30 Watts (120%)

Memory Bandwidth

In theory, the GeForce GTX 750 is 525% faster than the Radeon HD 4550 512MB overall, due to its greater data rate. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 67200 (525%)

Texel Rate

The GeForce GTX 750 should be much (approximately 580%) faster with regards to anisotropic filtering than the Radeon HD 4550 512MB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 27840 (580%)

Pixel Rate

The GeForce GTX 750 is quite a bit (about 580%) better at full screen anti-aliasing than the Radeon HD 4550 512MB, and will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 13920 (580%)

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 information (in units of MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.