GeForce GTX 280 vs GeForce GTX 965M

Intro

Compare those specs to the GeForce GTX 965M, which has clock speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 RAM. 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 280		236 Watts
	Difference: 176 Watts (293%)

Memory Bandwidth

The GeForce GTX 280, in theory, should perform a lot faster than the GeForce GTX 965M in general. (explain)

GeForce GTX 280		141696 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 77696 (121%)

Texel Rate

The GeForce GTX 965M should be a lot (about 25%) more effective at anisotropic filtering than the GeForce GTX 280. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTX 280		48160 Mtexels/sec
	Difference: 12256 (25%)

Pixel Rate

The GeForce GTX 965M should be a lot (approximately 57%) faster with regards to FSAA than the GeForce GTX 280, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 280		19264 Mpixels/sec
	Difference: 10944 (57%)

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 (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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