GeForce GTX 285 2GB vs GeForce GTX 965M

Intro

Compare all of that to the GeForce GTX 965M, which comes with core speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 144 Watts (240%)

Memory Bandwidth

The GeForce GTX 285 2GB, in theory, should perform much faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 94976 (148%)

Texel Rate

The GeForce GTX 965M should be a small bit (more or less 17%) better at anisotropic filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 8576 (17%)

Pixel Rate

The GeForce GTX 965M will be a lot (more or less 46%) faster with regards to AA than the GeForce GTX 285 2GB, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 9472 (46%)

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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.