GeForce GTX 980M vs Radeon HD 3650 512MB

Intro

Compare that to the Radeon HD 3650 512MB, which comes with a clock speed of 725 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 120(24x5) SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
GeForce GTX 980M		100 Watts
	Difference: 22 Watts (28%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be much faster than the Radeon HD 3650 512MB overall. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 102400 (400%)

Texel Rate

The GeForce GTX 980M will be quite a bit (more or less 1618%) more effective at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 93848 (1618%)

Pixel Rate

The GeForce GTX 980M is much (approximately 2191%) more effective at FSAA than the Radeon HD 3650 512MB, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 3650 512MB		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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.