GeForce GTX 850M vs Radeon HD 3650 512MB

Intro

Compare those specifications to the Radeon HD 3650 512MB, which features GPU core speed of 725 MHz, and 512 MB of GDDR3 RAM running at 800 MHz through a 128-bit bus. It also features 120(24x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 38 Watts (95%)

Memory Bandwidth

In theory, the GeForce GTX 850M is 25% faster than the Radeon HD 3650 512MB in general, due to its greater bandwidth. (explain)

GeForce GTX 850M		32000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The GeForce GTX 850M will be much (about 504%) more effective at texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 29240 (504%)

Pixel Rate

The GeForce GTX 850M is much (more or less 383%) faster with regards to full screen anti-aliasing than the Radeon HD 3650 512MB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 11116 (383%)

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 information (in units of MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record 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 the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.