GeForce 825M vs Radeon RX 470 4GB

Intro

Compare those specifications to the Radeon RX 470 4GB, which comes with clock speeds of 926 MHz on the GPU, and 1650 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator 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

The Radeon RX 470 4GB should theoretically be a lot faster than the GeForce 825M overall. (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 will be a lot (more or less 336%) faster with regards to FSAA than the GeForce 825M, and also will be able to handle higher resolutions without slowing down too much. (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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 per second. This is calculated by multiplying the total number 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 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 the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.