GeForce 825M vs Radeon R9 Nano

Intro

Compare those specs to the Radeon R9 Nano, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The HBM memory runs at a frequency of 500 MHz on this specific model. It features 4096 SPUs along with 256 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon R9 Nano		175 Watts
	Difference: 142 Watts (430%)

Memory Bandwidth

As far as performance goes, the Radeon R9 Nano should in theory be much superior to the GeForce 825M overall. (explain)

Radeon R9 Nano		512000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 497600 (3456%)

Texel Rate

The Radeon R9 Nano will be much (about 1782%) better at texture filtering than the GeForce 825M. (explain)

Radeon R9 Nano		256000 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 242400 (1782%)

Pixel Rate

The Radeon R9 Nano will be a lot (about 841%) more effective at anti-aliasing than the GeForce 825M, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 Nano		64000 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 57200 (841%)

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 largest amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.