GeForce 940M vs GeForce GTS 250 512MB

Intro

Compare those specs to the GeForce GTS 250 512MB, which has a clock speed of 738 MHz and a GDDR3 memory speed of 1100 MHz. It also makes use of a 256-bit memory bus, and makes use of a 65/55 nm design. It is made up of 128 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTS 250 512MB is 340% quicker than the GeForce 940M in general, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTS 250 512MB will be a lot (about 84%) more effective at AF than the GeForce 940M. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 250 512MB is superior to the GeForce 940M, by far. (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 maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, 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 most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.