GeForce 825M vs Radeon R7 M265

Intro

Compare all of that to the Radeon R7 M265, which has GPU core speed of 725 MHz, and 2048 MB of DDR3 memory running at 1000 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 M265 should be 122% quicker than the GeForce 825M overall, due to its higher data rate. (explain)

Radeon R7 M265		32000 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 17600 (122%)

Texel Rate

The Radeon R7 M265 is quite a bit (more or less 28%) better at anisotropic filtering than the GeForce 825M. (explain)

Radeon R7 M265		17400 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 3800 (28%)

Pixel Rate

The GeForce 825M should be just a bit (more or less 17%) better at AA than the Radeon R7 M265, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 1000 (17%)

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 largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.