GeForce 940M vs GeForce GTX 580

Intro

Compare those specifications to the GeForce GTX 580, which makes use of a 40 nm design. nVidia has clocked the core frequency at 772 MHz. The GDDR5 memory runs at a frequency of 1002 MHz on this specific model. It features 512 SPUs along with 64 TAUs and 48 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

GeForce GTX 580		4956 points
GeForce 940M		1740 points
	Difference: 3216 (185%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 should be quite a bit faster than the GeForce 940M in general. (explain)

GeForce GTX 580		192384 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 176384 (1102%)

Texel Rate

The GeForce GTX 580 will be a lot (approximately 92%) more effective at AF than the GeForce 940M. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 23680 (92%)

Pixel Rate

The GeForce GTX 580 should be a lot (about 332%) more effective at FSAA than the GeForce 940M, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 28480 (332%)

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 MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total 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 most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.