GeForce GTX 980M vs Radeon HD 3650 256MB

Intro

Compare those specs to the Radeon HD 3650 256MB, which comes with core clock speeds of 725 MHz on the GPU, and 800 MHz on the 256 MB of DDR2 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)

Radeon HD 3650 256MB		78 Watts
GeForce GTX 980M		100 Watts
	Difference: 22 Watts (28%)

Memory Bandwidth

The GeForce GTX 980M should in theory be quite a bit faster than the Radeon HD 3650 256MB in general. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 102400 (400%)

Texel Rate

The GeForce GTX 980M is quite a bit (approximately 1618%) better at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 93848 (1618%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980M is superior to the Radeon HD 3650 256MB, by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 63532 (2191%)

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 largest amount of information (in units of megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number 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 graphics card will be at 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 that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.