GeForce GTX 980M vs Radeon HD 3650

Intro

Compare all that to the Radeon HD 3650, which has core speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 RAM. It features 120(24x5) 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 3650		78 Watts
GeForce GTX 980M		100 Watts
	Difference: 22 Watts (28%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980M should in theory be a lot superior to the Radeon HD 3650 in general. (explain)

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

Texel Rate

The GeForce GTX 980M is quite a bit (about 1618%) more effective at anisotropic filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 980M is superior to the Radeon HD 3650, and very much so. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 3650		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: Memory bandwidth is the max amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.