GeForce 825M vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which has GPU clock speed of 900 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon R9 M275X		50 Watts
	Difference: 17 Watts (52%)

Memory Bandwidth

Theoretically, the Radeon R9 M275X should be a lot faster than the GeForce 825M in general. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 57600 (400%)

Texel Rate

The Radeon R9 M275X is much (about 165%) better at AF than the GeForce 825M. (explain)

Radeon R9 M275X		36000 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 22400 (165%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M275X is superior to the GeForce 825M, and very much so. (explain)

Radeon R9 M275X		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: Bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.