GeForce GTX 465 vs GeForce GTX 870M

Intro

Compare all of that to the GeForce GTX 870M, which makes use of a 28 nm design. nVidia has set the core speed at 941 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this particular card. It features 1344 SPUs as well as 112 TAUs and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
GeForce GTX 465		200 Watts
	Difference: 90 Watts (82%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 465 should theoretically be a small bit better than the GeForce GTX 870M in general. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 6592 (7%)

Texel Rate

The GeForce GTX 870M is a lot (more or less 295%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 870M		105392 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 78684 (295%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 870M is the winner, but only just. (explain)

GeForce GTX 870M		22584 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 3160 (16%)

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 past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 are processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.