GeForce 9800 GTX vs GeForce GTX 950M

Intro

Compare those specifications to the GeForce GTX 950M, which features a GPU core clock speed of 914 MHz, and 2048 MB of DDR3 memory set to run at 1000 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
GeForce 9800 GTX		140 Watts
	Difference: 85 Watts (155%)

Memory Bandwidth

As far as performance goes, the GeForce 9800 GTX should theoretically be quite a bit superior to the GeForce GTX 950M in general. (explain)

GeForce 9800 GTX		70400 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 38400 (120%)

Texel Rate

The GeForce 9800 GTX is a little bit (about 18%) better at texture filtering than the GeForce GTX 950M. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 6640 (18%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 950M is superior to the GeForce 9800 GTX, by a large margin. (explain)

GeForce GTX 950M		14624 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 3824 (35%)

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 information (counted in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.