GeForce GTX 470 vs Radeon HD 4650 1GB

Intro

Compare those specifications to the Radeon HD 4650 1GB, which comes with clock speeds of 600 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 470		215 Watts
	Difference: 160 Watts (291%)

Memory Bandwidth

In theory, the GeForce GTX 470 will be 498% faster than the Radeon HD 4650 1GB in general, because of its higher data rate. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 111520 (498%)

Texel Rate

The GeForce GTX 470 is quite a bit (approximately 77%) better at anisotropic filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 470		33992 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 14792 (77%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 470 is superior to the Radeon HD 4650 1GB, by far. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 19480 (406%)

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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 per second. This number is calculated by multiplying the total amount of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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.