Radeon HD 3650 vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specifications to the Radeon HD 6450 (OEM) 1GB, which features clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 160 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon HD 3650		78 Watts
	Difference: 47 Watts (152%)

Memory Bandwidth

Performance-wise, the Radeon HD 6450 (OEM) 1GB should in theory be a small bit better than the Radeon HD 3650 overall. (explain)

Radeon HD 6450 (OEM) 1GB		28800 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 3200 (13%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB is a bit (more or less 3%) more effective at texture filtering than the Radeon HD 3650. (explain)

Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 200 (3%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6450 (OEM) 1GB is superior to the Radeon HD 3650, though not by far. (explain)

Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 100 (3%)

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 data (counted in MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.