GeForce 940M vs GeForce GTS 250 512MB

Intro

Compare those specs to the GeForce GTS 250 512MB, which comes with a GPU core clock speed of 738 MHz, and 512 MB of GDDR3 RAM running at 1100 MHz through a 256-bit bus. It also is made up of 128 SPUs, 64 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTS 250 512MB should theoretically be much faster than the GeForce 940M in general. (explain)

GeForce GTS 250 512MB		70400 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 54400 (340%)

Texel Rate

The GeForce GTS 250 512MB should be a lot (more or less 84%) more effective at anisotropic filtering than the GeForce 940M. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 21504 (84%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTS 250 512MB is superior to the GeForce 940M, and very much so. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 3232 (38%)

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 largest amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock 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 graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.