GeForce GTX 965M vs Geforce GTX 780

Intro

Compare all of that to the Geforce GTX 780, which comes with a clock frequency of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is made up of 2304 SPUs, 192 TAUs, and 48 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 780		10082 points
GeForce GTX 965M		5650 points
	Difference: 4432 (78%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Geforce GTX 780		250 Watts
	Difference: 190 Watts (317%)

Memory Bandwidth

The Geforce GTX 780 should in theory perform a lot faster than the GeForce GTX 965M overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 224384 (351%)

Texel Rate

The Geforce GTX 780 will be quite a bit (approximately 174%) more effective at AF than the GeForce GTX 965M. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 105280 (174%)

Pixel Rate

The Geforce GTX 780 is much (more or less 37%) better at FSAA than the GeForce GTX 965M, and also should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GTX 965M		30208 Mpixels/sec
	Difference: 11216 (37%)

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 megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed 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 higher this number, the better the 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 record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.