GeForce GTX 870M vs GeForce GTX 965M

Intro

Compare all that to the GeForce GTX 965M, which features core speeds of 944 MHz on the GPU, and 1000 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs as well as 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 870M		4770 points
	Difference: 880 (18%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GTX 870M		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTX 870M should be a lot faster than the GeForce GTX 965M overall. (explain)

GeForce GTX 870M		96000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The GeForce GTX 870M should be quite a bit (about 74%) better at AF than the GeForce GTX 965M. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 44976 (74%)

Pixel Rate

The GeForce GTX 965M should be quite a bit (about 34%) more effective at AA than the GeForce GTX 870M, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 7624 (34%)

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 largest amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high 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 amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.