GeForce GTX 965M vs Geforce GTX 780

Intro

Compare that to the Geforce GTX 780, which features GPU clock speed of 863 MHz, and 3072 MB of GDDR5 RAM set to run at 1502 MHz through a 384-bit bus. It also features 2304 Stream Processors, 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, in theory, should perform much 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 is much (more or less 174%) more effective at texture filtering 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 will be quite a bit (approximately 37%) more effective at FSAA than the GeForce GTX 965M, and able to handle higher screen resolutions without slowing down too much. (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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.