Geforce GTX 780 vs Radeon HD 3650 512MB

Intro

Compare those specifications to the Radeon HD 3650 512MB, which makes use of a 55 nm design. AMD has set the core frequency at 725 MHz. The GDDR3 memory works at a speed of 800 MHz on this card. It features 120(24x5) SPUs as well as 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
Geforce GTX 780		250 Watts
	Difference: 172 Watts (221%)

Memory Bandwidth

The Geforce GTX 780, in theory, should be much faster than the Radeon HD 3650 512MB overall. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 262784 (1027%)

Texel Rate

The Geforce GTX 780 will be much (more or less 2757%) better at texture filtering than the Radeon HD 3650 512MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 159896 (2757%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 780 is superior to the Radeon HD 3650 512MB, by far. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 38524 (1328%)

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.