GeForce GTX 275 vs GeForce GTX 965M

Intro

Compare that to the GeForce GTX 965M, which has a core clock speed of 944 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 1024 SPUs, 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 275		219 Watts
	Difference: 159 Watts (265%)

Memory Bandwidth

The GeForce GTX 275, in theory, should perform a lot faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 63008 (98%)

Texel Rate

The GeForce GTX 965M should be a bit (about 19%) faster with regards to AF than the GeForce GTX 275. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 9776 (19%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 965M is the winner, by far. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 12484 (70%)

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 max amount of information (in units of MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount 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 processed in one second.

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