GeForce GTX 460 SE vs Radeon HD 4650 512MB

Intro

Compare that to the Radeon HD 4650 512MB, which has core clock speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 460 SE		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

In theory, the GeForce GTX 460 SE is 580% faster than the Radeon HD 4650 512MB in general, due to its greater data rate. (explain)

GeForce GTX 460 SE		108800 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 92800 (580%)

Texel Rate

The GeForce GTX 460 SE will be much (more or less 63%) better at texture filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 460 SE		31200 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 12000 (63%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 460 SE is the winner, by a large margin. (explain)

GeForce GTX 460 SE		20800 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 16000 (333%)

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 (counted in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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