GeForce GTS 450 1GB vs Radeon HD 3650 512MB

Intro

Compare those specs to the Radeon HD 3650 512MB, which features core speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 120(24x5) SPUs as well as 8 Texture Address Units 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

In theory, the GeForce GTS 450 1GB should be 126% quicker than the Radeon HD 3650 512MB in general, because of its greater data rate. (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 will be a lot (more or less 332%) more effective at texture 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 will be quite a bit (more or less 332%) more effective at FSAA than the Radeon HD 3650 512MB, and also should be capable of handling higher resolutions without slowing down too much. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.