GeForce GTX 650 Ti vs Radeon HD 4550 512MB

Intro

Compare those specifications to the Radeon HD 4550 512MB, which has core clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 80(16x5) SPUs along with 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 650 Ti		110 Watts
	Difference: 85 Watts (340%)

Memory Bandwidth

The GeForce GTX 650 Ti should in theory be a lot faster than the Radeon HD 4550 512MB in general. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 73600 (575%)

Texel Rate

The GeForce GTX 650 Ti will be a lot (about 1137%) more effective at AF than the Radeon HD 4550 512MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 54592 (1137%)

Pixel Rate

The GeForce GTX 650 Ti will be a lot (approximately 519%) more effective at anti-aliasing than the Radeon HD 4550 512MB, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 12448 (519%)

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 transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 can be applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.