GeForce GTX 460 2GB vs Radeon HD 4650 1GB

Intro

Compare that to the Radeon HD 4650 1GB, which features GPU clock speed of 600 MHz, and 1024 MB of GDDR3 RAM running at 700 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 105 Watts (191%)

Memory Bandwidth

In theory, the GeForce GTX 460 2GB should be 414% quicker than the Radeon HD 4650 1GB in general, due to its higher data rate. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 92800 (414%)

Texel Rate

The GeForce GTX 460 2GB should be quite a bit (more or less 97%) better at AF than the Radeon HD 4650 1GB. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 18600 (97%)

Pixel Rate

The GeForce GTX 460 2GB will be much (about 350%) more effective at AA than the Radeon HD 4650 1GB, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 16800 (350%)

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 data (counted in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.