GeForce GTX 465 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which comes with a core clock frequency of 876 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 465		200 Watts
	Difference: 160 Watts (400%)

Memory Bandwidth

The GeForce GTX 465, in theory, should perform much faster than the GeForce GTX 850M in general. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 70592 (221%)

Texel Rate

The GeForce GTX 850M will be much (approximately 31%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 8332 (31%)

Pixel Rate

The GeForce GTX 465 will be quite a bit (more or less 39%) faster with regards to anti-aliasing than the GeForce GTX 850M, and able to handle higher screen resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 5408 (39%)

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 max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.