GeForce GTX 750 vs Radeon HD 4550 512MB

Intro

Compare all of that to the Radeon HD 4550 512MB, which features core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 ROPs.

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 should be 525% quicker 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 is quite a bit (about 580%) more effective at texture 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 will be quite a bit (more or less 580%) more effective at AA than the Radeon HD 4550 512MB, and also should be able to handle higher resolutions while still performing well. (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 maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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