GeForce GTX 465 vs GeForce GTX 870M

Intro

Compare those specs to the GeForce GTX 870M, which features GPU core speed of 941 MHz, and 3072 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also is comprised of 1344 SPUs, 112 TAUs, and 24 Raster Operation Units.

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

The GeForce GTX 465 should in theory perform just a bit faster than the GeForce GTX 870M overall. (explain)

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

Texel Rate

The GeForce GTX 870M is quite a bit (approximately 295%) faster with regards to texture filtering than the GeForce GTX 465. (explain)

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

Pixel Rate

The GeForce GTX 870M will be a bit (more or less 16%) more effective at FSAA than the GeForce GTX 465, and should be able to handle higher resolutions better. (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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.