GeForce 940M vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which uses a 28 nm design. AMD has clocked the core frequency at 950 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this specific model. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7990		15520 points
GeForce 940M		1740 points
	Difference: 13780 (792%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 7990 should be quite a bit faster than the GeForce 940M overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 560000 (3500%)

Texel Rate

The Radeon HD 7990 will be a lot (more or less 845%) better at texture filtering than the GeForce 940M. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 217472 (845%)

Pixel Rate

The Radeon HD 7990 is much (more or less 609%) better at anti-aliasing than the GeForce 940M, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 52224 (609%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.