GeForce GTX 965M vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which uses a 28 nm design. nVidia has clocked the core frequency at 1126 MHz. The GDDR5 RAM runs at a speed of 1750 MHz on this particular model. It features 2048 SPUs along with 128 TAUs and 64 Rasterization Operator Units.

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 980		13552 points
GeForce GTX 965M		5650 points
	Difference: 7902 (140%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 980		165 Watts
	Difference: 105 Watts (175%)

Memory Bandwidth

Theoretically, the GeForce GTX 980 should be a lot faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 160000 (250%)

Texel Rate

The GeForce GTX 980 will be a lot (about 139%) better at texture filtering than the GeForce GTX 965M. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 83712 (139%)

Pixel Rate

The GeForce GTX 980 will be a lot (about 139%) more effective at AA than the GeForce GTX 965M, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GTX 965M		30208 Mpixels/sec
	Difference: 41856 (139%)

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 max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 maximum number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.