GeForce 9400 GT 256MB vs GeForce GTX 965M

Intro

Compare that to the GeForce GTX 965M, which uses a 28 nm design. nVidia has clocked the core speed at 944 MHz. The GDDR5 RAM works at a speed of 1000 MHz on this specific model. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GTX 965M		60 Watts
	Difference: 10 Watts (20%)

Memory Bandwidth

The GeForce GTX 965M, in theory, should be much faster than the GeForce 9400 GT 256MB in general. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The GeForce GTX 965M should be quite a bit (approximately 1273%) faster with regards to anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 56016 (1273%)

Pixel Rate

The GeForce GTX 965M should be quite a bit (approximately 1273%) better at AA than the GeForce 9400 GT 256MB, and also will be able to handle higher resolutions better. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 28008 (1273%)

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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core 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 amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.