GeForce GTX 465 vs Radeon HD 4550 256MB

Intro

Compare all of that to the Radeon HD 4550 256MB, which features a GPU core clock speed of 600 MHz, and 256 MB of DDR3 RAM running at 800 MHz through a 64-bit bus. It also features 80(16x5) Stream Processors, 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 256MB		25 Watts
GeForce GTX 465		200 Watts
	Difference: 175 Watts (700%)

Memory Bandwidth

The GeForce GTX 465 should theoretically be a lot faster than the Radeon HD 4550 256MB in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 89792 (702%)

Texel Rate

The GeForce GTX 465 should be much (more or less 456%) faster with regards to texture filtering than the Radeon HD 4550 256MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 21908 (456%)

Pixel Rate

The GeForce GTX 465 will be much (approximately 709%) faster with regards to anti-aliasing than the Radeon HD 4550 256MB, and also capable of handling higher resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 17024 (709%)

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 max amount of information (in units of MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range 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 amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.