GeForce GTX 580 vs GeForce GTX 965M

Intro

Compare those specs to the GeForce GTX 965M, which uses a 28 nm design. nVidia has clocked the core speed at 944 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this particular card. It features 1024 SPUs along with 64 TAUs and 32 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 965M		5650 points
GeForce GTX 580		4956 points
	Difference: 694 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 580		244 Watts
	Difference: 184 Watts (307%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform quite a bit faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 128384 (201%)

Texel Rate

The GeForce GTX 965M should be much (more or less 22%) faster with regards to texture filtering than the GeForce GTX 580. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 11008 (22%)

Pixel Rate

The GeForce GTX 580 should be much (about 23%) faster with regards to anti-aliasing than the GeForce GTX 965M, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTX 965M		30208 Mpixels/sec
	Difference: 6848 (23%)

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 data (counted in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the 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 that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.