GeForce GTX 460 (OEM) vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which has a clock frequency of 600 MHz and a DDR2 memory speed of 500 MHz. It also makes use of a 128-bit bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 TAUs, 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 (OEM)		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 (OEM) should in theory be a lot better than the Radeon HD 4650 512MB in general. (explain)

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

Texel Rate

The GeForce GTX 460 (OEM) is quite a bit (more or less 90%) more effective at AF than the Radeon HD 4650 512MB. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 17200 (90%)

Pixel Rate

The GeForce GTX 460 (OEM) should be much (approximately 333%) more effective at FSAA than the Radeon HD 4650 512MB, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 460 (OEM)		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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.