GeForce 825M vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which comes with a GPU core clock speed of 926 MHz, and 4096 MB of GDDR5 RAM set to run at 1650 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 87 Watts (264%)

Memory Bandwidth

In theory, the Radeon RX 470 4GB will be 1367% faster than the GeForce 825M in general, due to its greater data rate. (explain)

Radeon RX 470 4GB		211200 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 196800 (1367%)

Texel Rate

The Radeon RX 470 4GB is a lot (approximately 772%) faster with regards to anisotropic filtering than the GeForce 825M. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 104928 (772%)

Pixel Rate

The Radeon RX 470 4GB is much (about 336%) faster with regards to full screen anti-aliasing than the GeForce 825M, and capable of handling higher resolutions while still performing well. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 22832 (336%)

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 MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.