GeForce GTX 275 vs GeForce GTX 965M

Intro

Compare all of that to the GeForce GTX 965M, which uses a 28 nm design. nVidia has clocked the core speed at 944 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

In theory, the GeForce GTX 275 is 98% quicker than the GeForce GTX 965M in general, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GTX 965M will be just a bit (more or less 19%) more effective at anisotropic filtering than the GeForce GTX 275. (explain)

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

Pixel Rate

The GeForce GTX 965M is a lot (more or less 70%) faster with regards to full screen anti-aliasing than the GeForce GTX 275, and also able to handle higher screen resolutions without losing too much performance. (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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 can be processed in one second. This is worked out by multiplying the total amount of texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.