GeForce 825M vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which features clock speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce 825M		33 Watts
	Difference: 3 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon R7 240 should in theory be a lot superior to the GeForce 825M in general. (explain)

Radeon R7 240		28800 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 14400 (100%)

Texel Rate

The Radeon R7 240 should be a small bit (approximately 7%) better at anisotropic filtering than the GeForce 825M. (explain)

Radeon R7 240		14600 Mtexels/sec
GeForce 825M		13600 Mtexels/sec
	Difference: 1000 (7%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 825M is the winner, but only just. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 960 (16%)

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 data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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