GeForce GTX 660 vs GeForce GTX 965M

Intro

Compare those specs to the GeForce GTX 965M, which has a clock frequency 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 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 965M		5650 points
GeForce GTX 660		5063 points
	Difference: 587 (12%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 660		140 Watts
	Difference: 80 Watts (133%)

Memory Bandwidth

The GeForce GTX 660, in theory, should be a lot faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 80192 (125%)

Texel Rate

The GeForce GTX 660 is a lot (more or less 30%) better at texture filtering than the GeForce GTX 965M. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 17984 (30%)

Pixel Rate

The GeForce GTX 965M should be quite a bit (about 28%) more effective at full screen anti-aliasing than the GeForce GTX 660, and should be able to handle higher screen resolutions better. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 6688 (28%)

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 megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are processed per second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core 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 lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.