GeForce 940M vs GeForce 9500 GT 1GB GDDR3

Intro

Compare those specifications to the GeForce 9500 GT 1GB GDDR3, which comes with a clock speed of 550 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It features 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 9500 GT 1GB GDDR3 should be quite a bit faster than the GeForce 940M in general. (explain)

GeForce 9500 GT 1GB GDDR3		25600 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 9600 (60%)

Texel Rate

The GeForce 940M will be much (more or less 192%) better at texture filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

GeForce 940M		25728 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 16928 (192%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 940M is the winner, and very much so. (explain)

GeForce 940M		8576 Mpixels/sec
GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
	Difference: 4176 (95%)

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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.