GeForce GTX 460 vs Radeon HD 4650 512MB

Intro

Compare that to the Radeon HD 4650 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 600 MHz. The DDR2 memory runs at a frequency of 500 MHz on this card. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the GeForce GTX 460 should perform much faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GTX 460		86400 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 70400 (440%)

Texel Rate

The GeForce GTX 460 will be much (approximately 97%) faster with regards to anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 460		37800 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 18600 (97%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 460 is superior to the Radeon HD 4650 512MB, by far. (explain)

GeForce GTX 460		16200 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 11400 (238%)

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 data (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

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