GeForce 940M vs GeForce 9800 GT 1GB

Intro

Compare those specs to the GeForce 9800 GT 1GB, which features GPU clock speed of 600 MHz, and 1024 MB of GDDR3 memory set to run at 900 MHz through a 256-bit bus. It also is comprised of 112 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 9800 GT 1GB will be 260% faster than the GeForce 940M in general, because of its greater bandwidth. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 41600 (260%)

Texel Rate

The GeForce 9800 GT 1GB will be quite a bit (more or less 31%) better at anisotropic filtering than the GeForce 940M. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce 940M		25728 Mtexels/sec
	Difference: 7872 (31%)

Pixel Rate

The GeForce 9800 GT 1GB should be a small bit (about 12%) more effective at AA than the GeForce 940M, and also able to handle higher resolutions while still performing well. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce 940M		8576 Mpixels/sec
	Difference: 1024 (12%)

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 max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.