GeForce GTX 460 (OEM) vs Radeon HD 4550 256MB

Intro

Compare those specs to the Radeon HD 4550 256MB, which has a core clock speed of 600 MHz and a DDR3 memory frequency of 800 MHz. It also uses a 64-bit memory bus, and makes use of a 55 nm design. It is comprised of 80(16x5) SPUs, 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 256MB		25 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 125 Watts (500%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 460 (OEM) should be much faster than the Radeon HD 4550 256MB in general. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 96000 (750%)

Texel Rate

The GeForce GTX 460 (OEM) should be quite a bit (approximately 658%) faster with regards to anisotropic filtering than the Radeon HD 4550 256MB. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 31600 (658%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 460 (OEM) is the winner, by far. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 18400 (767%)

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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.