GeForce GTX 470 vs GeForce GTX 850M

Intro

Compare those specifications to the GeForce GTX 850M, which features core speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

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 850M		3340 points
GeForce GTX 470		2937 points
	Difference: 403 (14%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GTX 470		215 Watts
	Difference: 175 Watts (438%)

Memory Bandwidth

In theory, the GeForce GTX 470 is 319% faster than the GeForce GTX 850M in general, because of its higher data rate. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 101920 (319%)

Texel Rate

The GeForce GTX 850M is a little bit (approximately 3%) faster with regards to AF than the GeForce GTX 470. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 1048 (3%)

Pixel Rate

The GeForce GTX 470 will be a lot (about 73%) faster with regards to anti-aliasing than the GeForce GTX 850M, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 10264 (73%)

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 largest amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the potential to reach the max fill rate.