GeForce 940M vs Radeon HD 5830

Intro

Compare those specifications to the Radeon HD 5830, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is made up of 1120(224x5) SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 5830 should be a lot faster than the GeForce 940M overall. (explain)

Radeon HD 5830		128000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 112000 (700%)

Texel Rate

The Radeon HD 5830 is a lot (more or less 74%) more effective at AF than the GeForce 940M. (explain)

Radeon HD 5830		44800 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 19072 (74%)

Pixel Rate

The Radeon HD 5830 should be much (approximately 49%) faster with regards to anti-aliasing than the GeForce 940M, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 5830		12800 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 4224 (49%)

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 maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.