GeForce GTS 450 1GB vs Radeon HD 3650 256MB

Intro

Compare all of that to the Radeon HD 3650 256MB, which uses a 55 nm design. AMD has set the core frequency at 725 MHz. The DDR2 memory works at a frequency of 800 MHz on this specific 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 256MB		78 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 28 Watts (36%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB will be 126% faster than the Radeon HD 3650 256MB overall, because of its higher bandwidth. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 32128 (126%)

Texel Rate

The GeForce GTS 450 1GB should be much (about 332%) faster with regards to AF than the Radeon HD 3650 256MB. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 19256 (332%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 1GB is superior to the Radeon HD 3650 256MB, and very much so. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 9628 (332%)

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 maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.