GeForce 9500 GT 1GB GDDR3 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which uses a 28 nm design. nVidia has set the core speed at 876 MHz. The DDR3 memory works at a frequency of 1000 MHz on this specific model. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce 9500 GT 1GB GDDR3		50 Watts
	Difference: 10 Watts (25%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M is 25% quicker than the GeForce 9500 GT 1GB GDDR3 in general, because of its higher data rate. (explain)

GeForce GTX 850M		32000 MB/sec
GeForce 9500 GT 1GB GDDR3		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The GeForce GTX 850M will be much (more or less 298%) faster with regards to AF than the GeForce 9500 GT 1GB GDDR3. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 26240 (298%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 850M is a better choice, by far. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
	Difference: 9616 (219%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.