GeForce 825M vs Radeon R9 M290X

Intro

Compare those specs to the Radeon R9 M290X, which uses a 28 nm design. AMD has set the core speed at 850 MHz. The GDDR5 memory works at a speed of 1200 MHz on this card. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon R9 M290X		100 Watts
	Difference: 67 Watts (203%)

Memory Bandwidth

The Radeon R9 M290X, in theory, should perform quite a bit faster than the GeForce 825M overall. (explain)

Radeon R9 M290X		153600 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 139200 (967%)

Texel Rate

The Radeon R9 M290X is quite a bit (about 400%) more effective at AF than the GeForce 825M. (explain)

Radeon R9 M290X		68000 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 54400 (400%)

Pixel Rate

The Radeon R9 M290X will be much (approximately 300%) more effective at AA than the GeForce 825M, and should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 M290X		27200 Mpixels/sec
GeForce 825M		6800 Mpixels/sec
	Difference: 20400 (300%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.