GeForce 8400 GS 512MB vs GeForce GTX 950M

Intro

Compare those specs to the GeForce GTX 950M, which features a core clock speed of 914 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
GeForce GTX 950M		55 Watts
	Difference: 15 Watts (38%)

Memory Bandwidth

Performance-wise, the GeForce GTX 950M should in theory be much better than the GeForce 8400 GS 512MB in general. (explain)

GeForce GTX 950M		32000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 25600 (400%)

Texel Rate

The GeForce GTX 950M is quite a bit (more or less 603%) better at texture filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTX 950M		36560 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 31360 (603%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 950M is the winner, by far. (explain)

GeForce GTX 950M		14624 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 12024 (462%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.