GeForce 825M vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which uses a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM runs at a speed of 1375 MHz on this model. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon R9 M280X		75 Watts
	Difference: 42 Watts (127%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M280X should perform a lot faster than the GeForce 825M overall. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 73600 (511%)

Texel Rate

The Radeon R9 M280X is a lot (approximately 271%) faster with regards to AF than the GeForce 825M. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 36800 (271%)

Pixel Rate

The Radeon R9 M280X will be much (approximately 112%) faster with regards to anti-aliasing than the GeForce 825M, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M280X		14400 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 7600 (112%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video 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 number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.