GeForce GTX 465 vs GeForce GTX 850M

Intro

Compare all that to the GeForce GTX 850M, which comes with core speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator 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

Performance-wise, the GeForce GTX 465 should theoretically be a lot superior to 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 (about 31%) faster with regards to 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

If running with lots of anti-aliasing is important to you, then the GeForce GTX 465 is the winner, by far. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.