GeForce GTX 850M vs Radeon HD 3650 512MB

Intro

Compare those specifications to the Radeon HD 3650 512MB, which has clock speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

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

Performance-wise, the GeForce GTX 850M should theoretically be much superior to the Radeon HD 3650 512MB in general. (explain)

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

Texel Rate

The GeForce GTX 850M is quite a bit (about 504%) better at anisotropic 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 a lot (more or less 383%) better at AA than the Radeon HD 3650 512MB, and should be able to handle higher resolutions while still performing well. (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 data (in units of megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate 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 lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.