GeForce GTX 285 2GB vs GeForce GTX 965M

Intro

Compare all 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 memory. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

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

Performance-wise, the GeForce GTX 285 2GB should in theory be a lot superior to the GeForce GTX 965M in general. (explain)

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

Texel Rate

The GeForce GTX 965M is just a bit (approximately 17%) faster with regards to texture 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 should be much (approximately 46%) faster with regards to AA than the GeForce GTX 285 2GB, and also capable of handling higher resolutions without slowing down too much. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the 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 the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.