GeForce GTS 450 1GB vs Radeon HD 3650 512MB

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 28 Watts (36%)

Memory Bandwidth

Theoretically, the GeForce GTS 450 1GB should be quite a bit faster than the Radeon HD 3650 512MB overall. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 32128 (126%)

Texel Rate

The GeForce GTS 450 1GB is a lot (about 332%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 19256 (332%)

Pixel Rate

The GeForce GTS 450 1GB should be quite a bit (approximately 332%) more effective at FSAA than the Radeon HD 3650 512MB, and should be able to handle higher resolutions better. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 3650 512MB		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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.